Midwest Industries 2 piece free float carbine handguard is an easy, high quality upgrade to your carbine length AR-15. Features: 100% made in the U.S.A. with Lifetime Warranty Complete install in minutes, removal of delta ring is required Four anti-rotation QD sockets for push button swivels High quality 1913 mil-spec rails, T-marked for accessory location Incredibly lightweight, extremely solid lock-up with monolithic type continuous top rail Billet machined from 6061 aluminum and hard coat anodized. Carbine Length Piston compatible Works with most well-known piston systems including STAG, CMMG, ADAMS and Smith & Wesson. (Will not work with Osprey Systems)