Umarex Legends M3 Grease Gun is a true US Military replica submachine BB airgun. The full metal airgun fires 177 bb’s at a 1025 rpm fire rate. It is powered by two, 12 gram C02 capsules that will provide charge for up to 3 full magazines on full auto. Umarex focused on making an accurate representation of the submachine gun by including a live-action bolt operation, authentic magazine... https://airgunshopdepot.com/product/umarex-legends-m3-grease-gun-177-caliber-bb-air-rifle/