Product Details
This is the lower receiver part you'll need if you're building a 9mm AR-style rifle from scratch, and it's made to work with standard Colt-pattern parts. The bolt automatically locks back when you fire your last round, which is a nice safety feature that lets you know you're out of ammo. It comes finished in black and ready to pair with the upper receiver and other components of your choosing. If you're curious about building your own rifle, this is a solid, reliable foundation to start with.