Miniature Angled ForegripFits Goatgun Picatinny Railing | Screws Into PlaceFits our AR/M4 railing models2" in length1/2" in height at peakDie cast metal, painted flat blackTo put on, remove screw then slide onto railing and tighten screw.Make it unique! Spray paint to customize yoursWhen installing, it may be easiest to remove bolt (unthread nut all the way) and the slide from front of model AR before placing rails.