The Tekko Metal AR-15 Carbine M-LOK(TM) 7″ Rail System replaces the plastic carbine factory handguard in minutes and requires no gunsmithing or special installation tools. Drop in” screw less” installation means no permanent alterations need be made to the rifle. The unit is held in place by the Delta ring and handguard cap. M-LOK(TM) attachment system provides secure mounting for M-LOK(TM) accessories such as MIL-STD 1913 Picatinny Rail attachments vertical grips” lights” lasers” bipods and other rail mounted kit. M-LOK(TM) system allows for universal modularity between numerous manufacturers of accessories” and accessory rails.