Mesa Tactical SureShell Polymer Carrier for M4 Carbine Stock 6-Shell 12-GA ambi Black. Mesa Tactical machines these Ammo Pouches from aircraft grade 6061-T6 aluminum with mil-spec hard anodizing for a durable non-glare matte finish. Mesa Tactical SureShell Side Mount Shotshell Carriers need no gunsmithing for installation. For a distinctive look and convenient shell storage install the Mesa Tactical SureShell Shell Carrier w/Side Mount. Features of Mesa Tactical SureShell Side Mount Shell Carrier: The best and most durable weapon mounted shotshell carrier available. Innovative rubber friction retention system solidly holds shotshells in place. Machined from 6061-T6 aluminum. Hard coat anodized matte black for durable non-glare finish. Available for a wide variety of shotguns. No gunsmithing required. Lifetime Warranty. Package Contents: Mesa Tactical SureShell Side Mount Shell Carrier includes necessary hardware Mesa Tactical 94770: SureShell Polymer Carrier for M4 Carbine Stock 6-Shell 12-GA ambi Black