Let the full auto fun begin. The Legends MP CO2 Blowback Submachine Gun gives you the option to shoot in either semi or full-auto mode. This full metal CO2 gun is an authentic replica of the MP40, a historic firearm developed in 1940 for German paratroopers during WWII. Features include realistic blowback action, an adjustable rear sight for elevation, a folding stock, and an adjustable butt plate. Holds 60 rounds of 4.5mm steel BBs.