The Black Tactical Elastic Buttstock Rifle Cartridge Holder is designed to snugly fit on the stock of your firearm. Perfect for hunting and tactical rifles for quick access to your ammo cartridges. This rifle stock cartridge holder is Heavy duty two-way stretch elastic. Will stretch over most standard rifle stocks and stay securely in place. Holder has 9 elastic loops for individual cartridges that will hold most hunting cartridges from .223,.308 and up. Length: 6.0 inches.