Perfect for range shooting, the AR-15 Brass Catcher from Caldwell takes the hassle out of collecting your brass casings. The steel frame easily attaches to the Picatinny rail of any AR with a Mil-Spec anodized-aluminum clamp. Clamp and wire frame are fully adjustable and work with almost any scope mount, optic or sight – brass enter the bag without interrupting cycling or disrupting the bolt function of the rifle. Multiple detent locking locations accommodate guns of varying thickness. Bag holds up to 100 rounds of empty brass. Convenient zipper at the bottom of the heat-resistant, nylon-mesh bag makes emptying brass casings a breeze. Imported.