The Ammo Brass Shell Catcher protects the ejected brass from getting damaged and allows you to reuse those spent brass casings. The brass catcher works tight to the ejection port and catches the flying brass, saving your clean-up time and avoiding the hot cartridge cases landing on people at the range. An incorporated hook and loop strap fits forearm of AR-15 and keeps the catcher securely against the weapon. Adjustable velcro strap loop attaches easily and securely around the different sized handguards or forends of your rifle without interfering the function of the firearm. Zippered bottom makes you no need to remove the bag from Rifle to empty the brass, also no more brass lost. Captures and holds approximately 30 rounds.