Polymer 80 INC P80NKITBLK: Polymer80's G150 Phoenix, Gen2 Lower Receiver Kit features Polymer80's proprietary polymer composite, a solid core design, stiffened magwell and beefier MIL-SPEC buffer tube housing. The pistol grip area has a unique no-thread design specific to Polymer80 lowers. The kit includes a AR15 lower receiver and jig, drill bits (trigger pin and safety selector switch holes), end mill bit, set screw bolt catch pin, dowel pin for bolt catch, pistol grip nut and screw, and an Allen wrench. This system is designed as a complete kit and has a black finish.