The KP-15 is a monolithic polymer AR15 style receiver made from injection molded 30% glass filled nylon incorporating the buttstock, buffer tube, pistol grip, and trigger into the receiver design as integral components. The KP-15 is lighter weight and lower cost compared to similarly configured receivers.Features :MLOK Slots at rear of stock for sling attachment points or run a strap through it for simple sling attachmentHoles at the front of the stock for QD socket inserts"A1 Length 13" Length of Pull (LOP) Buttstock to fit a wide range of shooters,Flared magwell