BlackHawk Buttstock Mag Pouch w/Adjustable Lid Black. The lid is fully adjustable for 20 or 30 round mags. Black Hawk Butt Stock Magazine Pouch with Adjustable Lid is made of 1000 denier NyTaneon and abrasion resistant webbing lid secured by hook & loop BlackHawk Buttstock Mag Pouches attach to butt stock by adjustable straps and have an elastic forward slip protection strap on back. Features of Blackhawk Butt Stock Magazine Pouch: Adjustable to hold 20 or 30 round magazines Made of 1000D NyTaneon nylon Package Contents: BlackHawk Buttstock Mag Pouch W/ Adj Lid Black BlackHawk 52BS16BK: Buttstock Mag Pouch w/Adjustable Lid Black