FMJ, or full metal jacket, ammo is a type of ammunition that consists of a lead core surrounded by a tough metal shell. This metal shell helps to protect the lead core from damage and ensures that the bullet will keep its shape during flight. FMJ ammo is often used for target practice and plinking because it is relatively inexpensive and has good accuracy. It is also popular for self-defense because it can penetrate barriers like walls and doors.
Matthew Answered question June 29, 2022