A lower parts kit is a set of parts that are used to make up the lower portion of a firearm. This can include the trigger, hammer, bolt release, magazine release, and safety. A lower parts kit helps to ensure that these critical components are all compatible with each other and function properly. Many gun owners choose to purchase a lower parts kit so they can build their firearm from scratch, or simply to have all the necessary parts on hand in case something needs to be replaced.
Robert Answered question August 26, 2022