Radical Firearms AR-15 Complete Lower Receiver with M4 Stock

This Radical Firearms complete lower receiver is a mil spec AR-15 lower that comes fully assembled, ready to pair with a standard AR-15 upper receiver. The receiver is forged from aluminum, finished in black anodizing and stamped with Radical Firearms markings. Because the internal parts are already installed, there is no lower parts kit to fit before your build comes together.

The fire control is a mil spec trigger group. Out back is a mil spec carbine buffer tube with six stock positions, holding a carbine buffer and spring, and the M4 style stock slides along it so you can set the length of pull for your arms and your gear. An M4 style pistol grip completes the furniture. This lower makes sense as the start of an AR-15 build, as a ready lower to match an upper you already own, or as a replacement for a lower assembly you want to swap out.