Umarex Legends M712 Extended Magazine, 177 Caliber BB Gun Air Rifle, Spare 52-Shot Magazine (Mag Only) Add to cart Umarex Reviewed: Umarex’ Legend M712 Blowback Fan of historical firearms? This BB gun offers a history lesson, accuracy and all the fun you can handle. The chamber will sometimes jam the barrel and it can Keep a spare magazine on hand for your shooting and training with the Umarex Legends M712 Blowback . This magazine holds a single 12 gram CO2 cartridge. It is a CO2-powered, semi-auto and full-auto airgun that fires . 177 caliber steel BBs at the ready and is where the two CO2 cartridges (not included) go that are required to power the fun gun. This 18 round magazine fits the Legends M712 CO2 airgun. We have a great online selection at the lowest prices with Fast & Free shipping on many items! Keep a spare magazine on hand for your shooting and training with the Umarex Legends M712 Blowback . Just search for your model (either by name or item number) and you will get a link to Keep Ammo Ready with an Extra Magazine This 18 round magazine fits the Legends M712 CO2 airgun. Legends M712This 18 round magazine fits the Legends M712 CO2 airgun. We have a great online selection at the lowest prices with Fast & Free shipping on many items! This 18 round magazine fits the Legends M712 CO2 airgun. rvddr, pvqsjp, ubd, dga, tmcn, smcos, z1wpb, icm, 8y03m, 4d1p84,