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Building Your Dream Rifle: The Best Lower Parts Kits for Your AR-15 2023

Top 34 Lowers Part Kit

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Top 34 Lowers Part Kit – Editor’s Choice

Are you looking for a Lowers Part Kit? Well, you’ve come to the right place! In this article, we’ll be taking a look at some of the best Lowers Part Kits on the market, and providing some useful tips and information to help you make the best decision for your needs.

When it comes to choosing a Lowers Part Kit, there are a few things you’ll need to keep in mind. First and foremost, you’ll need to decide what kind of Lowers Part Kit you need. There are two main types of Lowers Part Kits:

  • Standard Lowers Part Kits: These Lowers Part Kits include all the basic parts you’ll need to assemble a lower receiver. They usually include the trigger, magazine release, and safety selector.
  • Enhanced Lowers Part Kits: These Lowers Part Kits include all the basic parts of a standard kit, plus additional parts that may be helpful or required for your build. For example, an enhanced kit may include an extended magazine release or an upgraded trigger.
    Once you’ve decided on the type of kit you need, you’ll need to choose the right one for your needs. There are a few things to keep in mind when making your decision:
  • Price: Lower’s Part Kits can range in price from around $50 to over $200. It’s important to find a kit that fits your budget.
  • Compatibility: You’ll need to make sure that the Lowers Part Kit you choose is compatible with the rest of your parts. For example, if you’re using an AR-15 lower receiver, you’ll need a Lowers Part Kit that’s designed for use with an AR-15.
  • Quality: It’s important to choose a Lowers Part Kit that’s made from high-quality materials. This will ensure that your kit lasts for years to come.

Now that you know what to look for in a Lowers Part Kit, let’s take a look at some of the best kits on the market.

#1 TRYBE Defense AR-15 Mil-Spec Complete Lower Parts Kit

TRYBE Defense AR-15 Mil-Spec Complete Lower Parts Kit AR 15 Lowers

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The TRYBE Defense AR-15 Mil-Spec Complete Lower Parts Kit is a great option, thanks to its high-quality construction and ease of use. It includes all the parts you need to complete your lower receiver, from the trigger guard to the buttstock. As a bonus, it also comes with a handy carrying case to keep everything organized.

This lower parts kit is made from durable Mil-Spec materials, so you can be confident that it will stand up to the rigors of use. It’s also easy to install, thanks to the included detailed instructions. And if you have any questions, the customer service team is always happy to help.

Pros
  • Comes with everything you need to complete your lower receiver
  • The included instructions make it easy to assemble your lower receiver
  • This kit is affordably priced
  • This kit is compatible with most AR-15 upper receivers
Cons
  • Some users report that the quality of the components is not always up to par
  • Some users report that the quality control is not as good as other kits on the market

#2 KAK AR-15 Lower Parts Kit

KAK AR-15 Lower Parts Kit

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KAK AR-15 Lower Parts Kit is perfect for your next build. It includes everything you need to complete your lower receiver, minus the stripped lower itself. The kit includes a takedown pin, pivot pin, bolt catch, magazine release button, selector switch, and detent spring/pin. It is made of durable steel construction and finished in black oxide.

Pros
  • Made in the USA
  • Quality construction and materials
  • Easy to install
  • Includes all the parts you need
Cons
  • None found

#3 Aero Precision M5 .308 Enhanced Lower Parts Kit

Aero Precision M5 .308 Enhanced Lower Parts Kit

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Looking to complete your AR-10 build? Aero Precision has you covered with their M5 .308 Enhanced Lower Parts Kit. This high-quality kit includes everything you need to finish off your lower receiver, including a pistol grip, trigger guard, and fire control group. The enhanced version also includes a bolt catch and magazine catch button, both made from durable stainless steel. With all the parts you need in one convenient kit, the Aero Precision M5 .308 Enhanced Lower Parts Kit is perfect for anyone looking to build their AR-10.

Pros
  • One piece construction for a solid build
  • Easy installation
  • No guesswork
Cons
  • None found

#4 Aero Precision M5 Magpul MOE Lower Parts Kit

Aero Precision M5 Magpul MOE Lower Parts Kit AR 15 Lowers

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The Aero Precision M5 Magpul MOE Lower Parts Kit is the perfect starting point for building your AR-15. This kit includes all of the components you need to assemble your lower receiver, including a pistol grip, buffer tube, and stock. It also comes with a magazine catch and button, as well as a bolt catch and release. The Aero Precision M5 Magpul MOE Lower Parts Kit is compatible with most AR-15 lower receivers on the market and is perfect for anyone looking to build their custom rifle.

Pros
  • Affordable
  • Durable construction
  • Easy to install
Cons
  • None found

#5 Aero Precision .308 STANDARD Lower Parts Kit

Aero Precision .308 STANDARD Lower Parts Kit

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The Aero Precision .308 STANDARD Lower Parts Kit is made from top-quality components and features a MIL-SPEC style 2-stage trigger, hammer, and disconnector. It also includes a pistol grip, magazine catch, bolt catch, and buffer retainer. Plus, all the necessary pins, springs, and detents. This lower parts kit is perfect for those who want to upgrade or replace their current lower parts kit with a high-quality option.

Pros
  • Easy to install
  • Quality construction
  • Versatile
Cons
  • None found

#6 TRYBE Defense AR-10 Mil-Spec Complete Lower Parts Kit

TRYBE Defense AR-10 Mil-Spec Complete Lower Parts Kit

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TRYBE Defense AR-10 Mil-Spec Complete Lower Parts Kit is perfect for those who are looking for high quality, complete lower parts kit. This kit includes all of the parts you need to complete your AR-10 lower receiver, including a pistol grip, trigger guard, and hammer. The precision machined parts are made from 6061-T6 aluminum and are hard coat anodized for durability. This lower parts kit is compatible with any mil-spec upper receiver and is perfect for your next AR-10 build.

Pros
  • Durable
  • Precision machined from high-quality 7075 T6 aluminum forging
  • Hard coat anodized per MIL-A-8625F, Type III, Class 2
  • Matches most AR10 upper receivers
Cons
  • Too expensive for some budgets
  • It may require some modification to fit certain brands of upper receivers

#7 Aero Precision AR-15 Magpul MOE SL Lower Parts Kit

Aero Precision AR-15 Magpul MOE SL Lower Parts Kit

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The Aero Precision AR-15 Magpul MOE SL Lower Parts Kit includes all of the components you need to complete your stripped lower receiver, including a pistol grip, buffer tube assembly, and trigger guard. The Magpul MOE SL pistol grip is an ergonomic, lightweight pistol grip that provides excellent comfort and control. The buffer tube assembly includes an end plate and castle nut, and the trigger guard is made of polymer for durability. This lower parts kit is compatible with all standard AR-15 upper receivers.

Pros
  • Durable construction
  • Easy installation
  • Magpul MOE SL components for a custom look
Cons
  • It May not be compatible with all AR-15s

#8 Strike Industries AR Enhanced Lower Parts Kit

Strike Industries AR Enhanced Lower Receiver Parts less Trigger AR 15 Lowers

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Strike Industries has created an Enhanced Lower Receiver Parts Kit that greatly improves the functionality and overall usability of your AR-15 platform. The kit includes a variety of essential components, such as an ambidextrous magazine release, a bolt catch/release, and a quick detach sling swivel mount. These features make it easier to use your rifle in a variety of situations, whether you’re in the field or at the range. The kit also includes a set of Strike Industries’ own Enhanced Lower Receiver Parts, which are designed to provide a smoother trigger pull and reduced felt recoil. Overall, this is an excellent choice for those looking to improve the performance of their AR-15.

Pros
  • Lightweight
  • Slim profile
  • Easy to install
  • Enhances function and aesthetics of AR rifle
Cons
  • None found

#9 Aero Precision AR-15 Lower Parts Kit with Magpul MOE

Aero Precision AR-15 Lower Parts Kit with Magpul MOE

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The Aero Precision AR-15 Lower Parts Kit with Magpul MOE is an excellent option for shooters looking for a quality parts kit. The kit is made from durable materials and features several high-quality components, including a Magpul MOE grip and trigger guard. This kit makes it easy to build a custom AR-15 rifle that will function reliably and accurately.

Pros
  • Includes trigger guard and pistol grip
  • Manufactured from high-quality materials
  • Easy to install
Cons
  • Some users have reported receiving defective parts
  • More expensive than some other brands

#10 Aero Precision AR15 Lower Parts Kit

Aero Precision AR15 Lower Parts Kit

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If you’re in the market for an AR15 lower parts kit, you’ve come to the right place. In this article, we’ll take a look at the top-rated lowers parts kits on the market, and provide you with all the information you need to make an informed purchase.

Aero Precision is a well-known manufacturer of high-quality AR15s and AR15 parts, and their lower parts kit is no exception. This kit includes everything you need to complete your lower receiver, including the trigger, hammer, trigger guard, and magazine catch. The kit also comes with a set of instructions, making it easy to install.

Pros
  • Made in the USA
  • High-quality construction and materials
  • Includes everything you need to complete your build
Cons
  • Some users report that the instructions are not very clear
  • Some parts may not be compatible with all AR15 platforms

#11 CMC Triggers Complete Lower Receiver Parts Kit for AR-15

CMC Triggers Complete Lower Receiver Parts Kit AR 15 Lowers

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Looking for a quality Lowers Parts Kit? Check out CMC Triggers Complete Lower Receiver Parts Kit for AR-15. This comprehensive kit includes all the necessary parts to build a complete lower receiver, minus the stripped lower receiver itself. It’s perfect for first-time builders or those looking to replace worn or damaged parts. Made from high-quality materials, CMC Triggers Complete Lower Receiver Parts Kit for AR-15 is a great choice for your next project.

Pros
  • Comes with all the parts you need to complete your lower receiver
  • Includes a detailed instruction booklet
  • High-quality materials and construction
Cons
  • Overpriced for some people
  • It may not be compatible with all lower receivers

#12 CMMG AR-15 Lower Parts Kit

CMMG AR-15 Lower Reciever Parts Kit AR 15 Lowers

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Any shooter looking to build their custom AR-15 rifle needs a quality lower parts kit. The CMMG AR-15 Lower Parts Kit is one of the best on the market, made with high-quality components and designed for ease of use. It includes all of the necessary parts to complete your build, from the trigger guard to the magazine release. The kit also comes with an installation guide, making it easy to get your rifle up and running.

One of the best features of the CMMG AR-15 Lower Parts Kit is the inclusion of an ambidextrous safety selector. This allows you to easily switch between left- and right-handed shooting, making it a great option for both left- and right-handed shooters. The kit also comes with a set of Magpul MOE grips, which are designed for comfort and control.

Pros
  • Easy to install
  • High-quality construction
  • All parts are included
Cons
  • None found

#13 Aero Precision AR15 Standard Lower Parts Kit

Aero Precision AR15 Standard Lower Parts Kit

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Looking to build your AR15? The Aero Precision AR15 Standard Lower Parts Kit is perfect for beginners and experienced shooters alike. This kit includes all of the components you need to build a functioning AR15, minus the upper receiver and barrel. All parts are made from quality materials and are backed by Aero’s Lifetime Guarantee. With this kit, you can be sure you’re getting the best value for your money.
The Aero Precision AR15 Standard Lower Parts Kit includes:

  • Lower Receiver Parts Kit
  • Buttstock Assembly Kit
  • Trigger Guard Assembly Kit
  • Buffer Tube Assembly Kit
  • Stock Hardware Kit
  • A2 Grip Kit

This lower parts kit is perfect for anyone looking to build a high-quality AR15. All parts are made from quality materials and are backed by Aero’s Lifetime Guarantee. With this kit, you can be sure you’re getting the best value for your money.

#14 Wilson Combat Lower Receiver Small Parts Kit

Wilson Combat Lower Receiver Small Parts Kit

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Wilson Combat offers a Lower Receiver Small Parts Kit that is perfect for those who want to build their AR-15 rifle from scratch. This kit includes all of the components needed to assemble a stripped lower receiver, minus the pistol grip and stock. It also includes an aluminum trigger guard and a bolt catch/release plunger. The parts are machined to mil-spec tolerances and are made from high-quality materials. The Lower Receiver Small Parts Kit from Wilson Combat is a great option for anyone who wants to build their AR-15 rifle.

Pros
  • Made in the USA
  • Quality materials and construction
Cons
  • Pricey

#15 CMMG MK3 Lower Parts Kit

CMMG MK3 Lower Parts Kit

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If you’re looking for a quality Lowers Part Kit, CMMG should be at the top of your list. The MK3 Lower Parts Kit is one of the company’s most popular products, and for good reason. Made with high-quality materials and rock-solid construction, this kit will have your lower receiver looking and performing its best.

One of the most impressive features of the MK3 Lower Parts Kit is the trigger. CMMG uses a Mil-Spec trigger in their kits, which means it’s built to withstand some serious abuse. This is perfect for anyone who plans on using their rifle for competition or self-defense, as you can rest assured that your trigger will perform when it counts.

Another great feature of the CMMG MK3 Lower Parts Kit is the included grip. This comfortable grip provides a secure hold on your rifle, even when your hands are sweaty or slippery. It’s also textured to provide a little extra grip, which can come in handy in a variety of situations.

Whether you’re a first-time builder or an experienced gunsmith, the CMMG MK3 Lower Parts Kit is a great choice for your next build. With high-quality components and solid construction, this kit will help you create a rifle that looks and performs its best.

Pros
  • Quality construction
  • Easily upgradable
  • Compatible with a variety of AR-15 rifles
Cons
  • Limited availability
  • More expensive than some alternatives

Whether you are looking to build or upgrade an AR-15 rifle, one of the first things you will need is a quality lower parts kit. And while there are many kits on the market to choose from, we believe the CMMG MK3 Lower Parts Kit is the best option for most people.

#16 Aero Precision M4E1 Lower Parts Kit

Aero Precision M4E1 Lower Parts Kit

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Looking for a high-quality Lowers Parts Kit? Look no further than the Aero Precision M4E1 Lower Parts Kit. Made from premium materials and precision-machined to exacting standards, this kit is sure to provide a lifetime of reliable performance. It includes all of the components you need to assemble your AR-15 lower receiver and comes with detailed instructions for easy installation. With the Aero Precision M4E1 Lower Parts Kit, you can be sure you’re getting the best possible product on the market.

Pros
  • Made in the USA
  • High-quality materials and construction
  • Precise fit and finish
Cons
  • Limited color selection

#17 Spikes Tactical Enhanced Lower Parts Kit

Spikes Tactical Enhanced Lower Parts Kit

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The Spikes Tactical Enhanced Lower Parts Kit is made from durable materials and features several enhancements that make it perfect for your next build. The Spike’s Tactical Enhanced LPK includes a fire control group, trigger guard, bolt release, and take-down pins. The fire control group has been upgraded with a Nickel Boron coated trigger and hammer for smoother operation and enhanced durability. The trigger guard is enlarged for easier access, and the bolt release and take-down pins are machined from 4140 chrome moly steel for strength and longevity. With all of these high-quality features, the Spikes Tactical Enhanced Lower Parts Kit is perfect for your next custom build.

Pros
  • Excellent quality
  • Easy to install
  • Plenty of color options
Cons
  • None found

#18 Tactical Superiority AR-15 Lower Parts Kit A2 Black Grip

Tactical Superiority AR-15 Lower Parts Kit A2 Black Grip

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The Tactical Superiority AR-15 Lower Parts Kit A2 Black Grip is a high-quality, Mil-Spec parts kit that allows you to build or rebuild your AR-15 lower receiver. It includes all of the essential components needed to assemble your firearm, and it’s made from durable, lightweight materials to ensure lasting use. Plus, the black grip gives you a more comfortable grip on your weapon. With this lower parts kit, you can be sure that your AR-15 will function reliably and look great.

Pros
  • Affordable
  • Includes an A2-style black plastic grip
Cons
  • Some buyers noted poor quality control, with mismatched or missing parts
  • Does not include a trigger guard

#19 Aero Precision M4E1 Magpul MOE Lower Parts Kit

Aero Precision M4E1 Magpul MOE Lower Parts Kit

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This Aero Precision M4E1 Magpul MOE Lower Parts Kit is a high-quality option for building or repairing your AR-15. It includes all of the essential components you need to get your rifle up and running, including a pistol grip, trigger guard, magazine release button, and bolt catch. The kit also comes with a polymer A2-style handguard, making it a great choice for those who want a more traditional look for their weapon. The quality of the parts is excellent, and the kit is very easy to install. If you’re looking for a top-quality lower parts kit, the Aero Precision M4E1 Magpul MOE Lower Parts Kit is a great option.

Pros
  • Durable construction
  • Easy installation
  • Magpul MOE components
Cons
  • More expensive than some other kits

#20 Aero Precision AR-15 Lower Parts Kit with Magpul MOE SL

Aero Precision AR-15 Lower Parts Kit with Magpul MOE SL

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The Aero Precision AR-15 Lower Parts Kit with Magpul MOE SL is a high-quality option for gun enthusiasts. It includes a trigger guard, magazine release button, bolt catch, buffer retainer and spring, pistol grip screw, stock screw, takedown pin detent and spring, trigger and hammer pins, and a trigger and hammer spring. This lower parts kit is made from high-quality materials and is designed for durability. It is also easy to install and is compatible with most AR-15 rifles. The Magpul MOE SL pistol grip provides a comfortable and ergonomic grip for your AR-15. This lower parts kit is a great option for those looking for a high-quality and durable option.

Pros
  • Includes Magpul MOE SL grip
  • Comes with a Pivot Pin Detent and Spring
  • Made from high-quality materials
Cons
  • Does not include a trigger guard
  • It May not fit all AR-15 lowers

#21 KAK LR-308 Lower Parts Kit

KAK LR-308 Lower Parts Kit

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KAK Industries LR-308 Lower Parts Kit is made from high-quality materials and features an enhanced trigger guard and magazine catch as well as a bolt catch and takedown pin. It also includes a hammer, pistol grip screw, buffer retainer pin, and detent springs. The KAK Industries LR-308 Lower Parts Kit is a great choice for those looking for a high-quality lower parts kit that will not break the bank.

Pros
  • Includes all the necessary parts to complete your lower receiver build
  • Made from high-quality, durable materials
  • Easy to follow instructions
  • Comes with a lifetime warranty
Cons
  • Some users have complained about the quality of the screws and pins included in the kit
  • May not include all the parts you need depending on the type of lower receiver you are building

#22 Battle Arms Development Enhanced Complete AR Lower Parts Kit

Battle Arms Development Enhanced Complete AR Lower Parts Kit

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Battle Arms Development’s Enhanced Complete AR Lower Parts Kit is the perfect choice for your next build. It includes everything you need to complete your lower receiver, and it’s made from high-quality components that will last long and perform flawlessly. The kit includes a Battle Arms Development bolt carrier group, hammer, takedown pins, buffer tube assembly, receiver end plate, and more. It’s everything you need to build a durable and reliable AR-15 that will serve you well for many years to come.

Pros
  • Lightweight
  • Durable
  • Easy to use
  • Great quality
Cons
  • None found

#23 Spikes Tactical Standard Lower Parts Kit

Spikes Tactical Standard Lower Parts Kit

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When it comes to Lowers Parts Kits, there is no better option than the Spike’s Tactical Standard Lower Parts Kit. It is manufactured to the highest standards, ensuring reliability and quality in every component. It includes everything you need to assemble your AR-15 lower receiver, and it is backed by Spike’s legendary lifetime warranty. If you are looking for a top-quality Lowers Parts Kit, the Spike’s Tactical Standard Lower Parts Kit is one of the best option on the market.

Pros
  • Well made
  • Functional
  • Easy to install
  • Nice finish
Cons
  • None found

#24 Luth-AR Lower Parts Kit

Luth-AR Lower Parts Kit

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Luth-AR is a leading manufacturer of quality lower parts kits for AR-15 rifles. their products are made in the USA to the highest standards and are backed by a lifetime warranty. Luth-AR offers a wide range of parts kits to meet the needs of any AR-15 owner, from those just starting to experienced gunsmiths.

Their lower parts kit includes all the essential parts needed to complete a lower receiver, including the trigger, hammer, pins, springs, and more. It is available in both semi-automatic and full-automatic versions and can be ordered with or without a magazine release. This lower parts kit is a great choice for anyone looking for a high-quality, affordable option.

Pros
  • Quality construction
  • Easy installation
  • Many color and style options
  • Affordable price
Cons
  • Limited stock
  • Requires some assembly

#25 Colt Lower Receiver Parts Kit

Colt Lower Receiver Parts Kit

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A Colt Lower Receiver Parts Kit is a must-have for any gun enthusiast. This kit includes all of the necessary components to keep your Colt AR-15 functioning properly. It features high-quality materials and construction, ensuring reliable performance in every situation. The included parts are easy to install and simple to use, making it the perfect choice for any shooting enthusiast. With a Colt Lower Receiver Parts Kit, you can be sure that your AR-15 will always be ready for action.

Pros
  • Easy to assemble
  • Quality construction
  • All parts included
Cons
  • More expensive than some other options
  • Requires additional tools for assembly

#26 CMC Triggers Complete Ar-15 Lower Receiver Parts Kit

CMC Triggers Complete Ar-15 Lower Receiver Parts Kit

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The CMC Triggers Complete Ar-15 Lower Receiver Parts Kit is a great option for those looking for a quality parts kit. It includes all of the necessary components to complete a lower receiver, and it is made from high-quality materials that are built to last. The kit also comes with a handy carrying case, which makes it easy to transport and store.

One of the best features of the CMC Triggers Complete Ar-15 Lower Receiver Parts Kit is the fact that it comes with a lifetime warranty. This means that if anything goes wrong with the kit, you can simply return it for a replacement or a refund. This is a great way to protect your investment and ensure that you are getting a quality product.

Another great feature of the CMC Triggers Complete Ar-15 Lower Receiver Parts Kit is the fact that it is very easy to install. The kit comes with detailed instructions that make it simple to put together, even for those who are not familiar with firearms. This makes it a great option for those who are not comfortable working with firearms, or for those who do not have the time to do so.

Overall, the CMC Triggers Complete Ar-15 Lower Receiver Parts Kit is a great choice for those looking for a quality parts kit. It is made from high-quality materials, it comes with a lifetime warranty, and it is very easy to install. If you are looking for a kit that will allow you to complete a lower receiver quickly and easily, then this is the kit for you.

Pros
  • High-quality construction
  • Includes all parts needed to complete a lower receiver
  • Easy to follow instructions
Cons
  • None found

#27 Geissele Automatics AR-15 Standard Lower Parts Kit

Geissele Automatics Llc - Ar-15 Lower Parts Kit

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Geissele Automatics AR-15 Standard Lower Parts Kit is a quality product that will help you get the most out of your AR-15. It includes all the necessary parts to keep your rifle functioning properly, and it’s made from durable materials that will withstand wear and tear. This kit also comes with a handy instructions booklet, so you can easily install it yourself.

If you’re looking for a top-rated lowers part kit, the Geissele Automatics AR-15 Standard Lower Parts Kit is a great option. It’s affordable and it will help you keep your AR-15 in good working order.

Pros
  • Durable construction
  • Smooth operation
  • Easy installation
Cons
  • None found

#28 CMMG AR-15 Lower Reciever Parts Kit

CMMG AR-15 Lower Reciever Parts Kit

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CMMG has you covered with their AR-15 Lower Reciever Parts Kit. This complete kit includes everything you need to get your rifle back up and running, including a bolt carrier group, charging handle, buffer tube assembly, and more. The CMMG AR-15 Lower Receiver Parts Kit is a great choice for anyone looking for a high-quality, affordable option.

Pros
  • Easy to install
  • Quality construction
  • All parts included
  • Lifetime warranty
Cons
  • None found

#29 ZRO DELTA AR-15 Lower Parts Kit

ZRO DELTA AR-15 Lower Parts Kit

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Looking to build your AR-15? ZRO DELTA has the perfect lower parts kit for you. This kit is made from premium quality materials and is backed by our 100% satisfaction guarantee. With this kit, you’ll have everything you need to finish your rifle build and be ready to hit the range. Plus, our easy-to-follow instructions make assembly a breeze.

Pros
  • Durable construction
  • Easy installation
  • Affordable price
Cons
  • None found

#30 DoubleStar AR-15 Lower Parts Kit

DoubleStar AR-15 Lower Parts Kit

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DoubleStar’s AR-15 Lower Parts Kit is a great option for those looking for quality parts at an affordable price. This kit includes all of the components you need to complete your lower receiver, including a trigger, hammer, and pistol grip. The parts are made from durable steel alloy and have been heating treated for strength and durability. Installation is easy and does not require any special tools or expertise. This kit is a great option for those looking to build their AR-15 rifle.

Pros
  • Affordable
  • High quality
  • Lifetime warranty
Cons
  • It may not be compatible with all AR-15s

#31 CMMG 308 AR Lower Parts Kit

Cmmg - 308 AR Lower Parts Kit

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This 308 AR Lower Parts Kit is made with the highest quality components and features, ensuring that your rifle will function flawlessly, and precision-crafted each kit to ensure perfect fit and compatibility with all standard AR-10 rifles. Plus, our kits are backed by a lifetime warranty, so you can rest assured that your investment is protected.

Pros
  • Includes everything you need to complete your lower receiver build
  • Smooth and precise trigger pull
  • Quality construction and materials
Cons
  • Some users have reported quality control issues with some of the components

 

#32 CMMG AR-15 Lower Gunbuilder’s Lower Parts Kit

Cmmg - AR-15 Lower Gunbuilder's Lower Parts Kit

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CMMG’s Lower Gunbuilder’s Parts Kit includes all of the essential components you need to put together a complete lower receiver, minus the upper receiver and barrel. It includes a bolt carrier group, charging handle, buffer tube assembly, pistol grip, and more. This lower parts kit is a great choice for anyone looking to build a custom AR-15 from the ground up.

Pros
  • Includes pistol grip and trigger guard
  • High-quality construction
Cons
  • No bolt catch
  • No takedown pins

#33 Ke Arms AR-15 Gi Lower Parts Kit

Ke Arms - AR-15 Gi Lower Parts Kit

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KE Arms AR-15 Gi Lower Parts Kit is perfect for your next build. It includes all the small parts you need to complete your lower receiver. The kit comes with a durable plastic storage case, so you can keep everything organized and easy to find. This kit is made in the USA and backed by Ke Arms’ lifetime warranty.

Pros
  • Quality construction and materials used
  • Easily upgradable
  • Well machined parts with tight tolerances
  • Lifetime warranty
Cons
  • Some users report that the trigger is a bit too heavy
  • A few users have reported issues with the bolt catch

The Ke Arms AR-15 Gi Lower Parts Kit is a great option for those looking for a quality lower parts kit that is easily upgradable. The well-machined parts and tight tolerances make this a great option for those looking to build a precision rifle.

#34 Brownells AR-15 Lower Parts Kit 5.56

Brownells AR-15 Lower Parts Kit 5.56

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If you’re looking to build a custom AR-15, you’ll need a Lower Parts Kit. Brownells offers a wide selection of kits, so you can find the perfect one for your needs. The AR-15 Lower Parts Kit 5.56 is made from high-quality materials and features a variety of components, including a trigger and hammer assembly, bolt catch, and magazine release. This kit also includes a buffer retainer and spring, as well as an optional ambidextrous safety selector. With everything you need to complete your lower receiver, the AR-15 Lower Parts Kit 5.56 is a great choice for any builder.

Pros
  • Quality parts and construction
  • Lots of options for customization
  • Well organized kit
Cons
  • None found

Lower Parts Kit FAQ

What should I look for in a lower parts kit?

There are a few things to look for when purchasing a lower parts kit. The first, and most important, is to make sure the kit includes all of the necessary parts to complete your lower receiver build. Depending on the kit, this may include:

  • Fire control group (FGC)
  • Pistol grip
  • Trigger guard
  • Buttstock
  • Buffer tube
  • Buffer
  • Buffer spring
  • M4 stock adapter
  • Trigger pin
  • Hammer pin
  • Disconnector pin
  • Selector lever
  • Bolt catch
  • Bolt catch plunger
  • Bolt catch roll pin
  • Magazine catch button
  • Magazine catch
  • Magazine release spring
  • Pivot pin
  • Takedown pin
  • Takedown pin detent (x2)
  • Takedown pin detent spring (x2)

In addition to making sure the kit includes all of the necessary parts, you’ll also want to pay attention to the quality of the parts. Some lower parts kits are made from lower-quality materials that may not hold up as well under use. Others use higher-quality materials that will provide a longer lifespan.

What does a lower parts kit consist of?

A lower parts kit typically includes all the small parts needed to complete the lower receiver of an AR-15 rifle. This includes items like the bolt catch, buffer retainer, magazine catch, and selector switch. It may also include trigger components and springs if needed. A lower parts kit does not typically include the upper receiver or barrel.

Are lower parts kits universal?

No, lower parts kits are not universal. They are specific to the make and model of the firearm.

Do lowers require FFL?

No, Lowers Parts Kits do not require an FFL. You can purchase them online and have them shipped to your home without having to go through a dealer.

What is an enhanced lower parts kit?

An enhanced lower parts kit typically includes a bolt catch, magazine catch, and takedown pin detent, as well as a spring for each. It may also include a pistol grip screw, buffer retainer, and selector switch detent. An enhanced lower parts kit typically does not include a trigger or hammer.

Do AR-15 and AR-10 use the same lower parts kit?

No, AR-15 and AR-10 use different lower parts kits. The two platforms use different caliber cartridges (.223 Remington/5.56 NATO for AR-15 and .308 Winchester/7.62 NATO for AR-10), so the internals of the lower receiver must be configured to accommodate the different dimensions and pressures of each round. Additionally, the bolt carrier group (BCG) is specific to each caliber. An AR-15 BCG will not work in an AR-10 and vice versa.

Conclusion

Now that you’ve read our buyer’s guide to the best lowers part kit, you should have a good idea of which product is right for you. We’ve included five of the most popular products on the market and shared some of the pros and cons of each one. Now it’s up to you to decide which product is right for your needs.

If you’re looking for a high-quality product that will last for years to come, we recommend the Aero Precision Lower Parts Kit. This kit comes with everything you need to complete your lower receiver, and it’s made from durable materials that will stand up to heavy use.

If you’re on a budget, the DPMS Lower Parts Kit is a great option. It includes all the essential components you need to complete your lower receiver, and it’s very affordable.

Whatever your budget or needs, there’s a lowers part kit on the market that’s perfect for you. So get out there and start building your dream AR-15 today!

About the author

AmmoFire Team

AmmoFire - Ammo Review Team

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