Exclusively compatible with the Gletcher TT-A GBB Pistol. Easy-access CO2 storage compartment. Full metal construction. Single stack design. 13 round max capacity. Strong return spring and durable follower. Follower locks into compressed position for loading. Loads quickly with a tube-style speed loader. In the Box 1X Magazine Specifications: Construction Full MetalCompatibility Gletcher TT-A GBB PistolCapacity 13 RoundsWeight 9.6 oz.Color BLACK California Proposition 65 Warning: Cancer and Reproductive Harm - www.P65Warnings.ca.gov