KAK Industry AR15 Lower Receiver K15 - BilletKAK Industries billet AR15 lower receiver is precision CNC machined from a solid block of high qaulity aircraft grade aluminum. All internal dimensions are cut to the proper military dimensions. Full M4/M16 spec fire control pocket. All receivers are media blasted and have a deep lustrious hard coat anodizing. These perfectly match our forged upper receivers. KAK Industry billet AR15 lower receivers are the perfect foundation for your next build.Machined from a solid block of aircraft quality aluminumFull M4/M16 style fire control group pocketPictogram selector markings on both sidesAccepts all standard/Milspec AR15 componentsCompatible with drop in trigger assembliesTumbled, deburred, media blastedCaliber: MULTIOversized integral trigger guard Milspec buffer tube Carbine Spring and BufferKAK lower partsMilspec End Plate and Castle NutFlared magwell for faster & easier reloads Type 3 Class II hard coat anodized - deep matte blackWeight 9.12 ozExcellent match with forged upper receivers