80% AR15 Lower Receiver Kit The Draco features a 360-degree flared mag well, ergonomic front grip, side grip, selector stops, mag catch safes, extreme high strength polymer composite, well protected mag release well, a solid core design, threadless grip design and heavier mil-spec buffer tube housing. AR15 polymer Lower Receiver Kit Includes: 80% Composite polymer AR15 Lower Receiver (Mil-spec) Arma Polytech Jig Trigger Hole Drill Guide Milling guide Drill Bits and End Mill Screw and nut for threadless grip retention Colors: Black / OD Green / Flat Dark Earth / Gray