Samson manufacturing is a leading manufacturer in aftermarket accessories for the AR15 rifles, from Keymod rails and rail accessories to backup iron sights. The Samson Keymod handstop/barricade device is a great alternative to a vertical foregrip. Simple installation is the beauty of the modular keymod rail, loosen the screws and insert into the desired placement on your Samson Keymod handguard and tighten said screws. The Samson Keymod handstop is machined from aircraft grade aluminium with knurled front for grabbing into a barricade when using it as a shooting support so it won't slip and make you miss the shot. The primary role of the Samson Keymod handstop is using with your support hand to steady the rifle.