The PSA MOE SBA3 lower build kit includes Magpul Original Equipment MOE lower parts kit, which means your AR pistol will be built to withstand a beating. The Magpul pistol grip and trigger guard are ergonomic for handling and operating, even with gloves on. The SBA3 brace is adjustable to 5 positions, and is designed for compatibility with AR pistol conversions capable of accepting a mil-spec carbine receiver.