GrovTec US Buttstock Cartridge Holder Shotgun Black. Easy to install and places your ammo right where you want it when you need it in a hurry. Specifications for GrovTec US Buttstock Cartridge TrueTimber Holder: Manufacturer: GrovTec US Fabric/Material: Nylon Cartridge Type: Universal Gun Model: Universal Gun Make: Universal Features of GrovTec US Buttstock Cartridge TrueTimber Holder Slips over stock Package Contents: GrovTec US Buttstock Cartridge TrueTimber Holder GrovTec US GTAC82: Buttstock Cartridge Holder Shotgun Black