The KP-9 is a monolithic polymer 9mm Glock Mag Compatible AR15 style receiver made from injection molded 30% glass filled nylon incorporating the buttstock, buffer tube, pistol grip, and trigger guard into the receiver design as integral components. This manufacturing process offers several advantages Lighter weight compared to similarly configured receivers Lower cost to similarly configured receivers Increased production speed and elimination of sub components through integration; especially important during high demand cycles in the market. Features Include: Compatibility with most common 9mm AR15 uppers and lower parts kits Compatible Mfg: Ke Arms