Mission First Tactical Tekko T-MARC 7in Drop in Keymod Rail -Drop in, screwless, installation means no permanent alterations need be made to the rifle. The unit is held in place by the Delta ring and handguard cap. KeyMod(TM) attachment system provides secure mounting for MIL-STD 1913 Picatinny rail attachments and accessories such as vertical grips, lights, lasers, bipods and other rail mounted kit. KeyMod(TM) system allows for universal modularity between numerous manufacturers of accessories, and accessory rails. 7" lightweight 6061 aluminum construction is Type 3 hard coat anodized, made in the USA, with a Lifetime Warranty. No Gunsmithing; Drop in screwless installation ; Secure platform for mounting Picatinny rails and accessories ; Lightweight 6061 aluminum construction is Type 3 hard coat anodized ; Carbine handguard replacement (7"); KeyMod(TM) The New Standard in Modularity ; Weight: 8.16 oz; Height: 1.634" Width: 1.821" Length: 7.258"