Palmetto State Armory

Overview

The PSA Complete Lower 300BO is a fully assembled lower receiver designed specifically for the AR-15 platform, optimized for the 300 Blackout caliber. Made from durable 7075-T6 aluminum and featuring a forged construction, this lower is built to withstand the rigors of shooting while providing a solid foundation for your build. With a trigger pin diameter of .154, it is compatible with a wide range of aftermarket triggers. This lower commonly appears in pistol builds, particularly those chambered in 300 Blackout, making it a versatile choice for builders looking to enhance their firearm's capabilities.