Umarex Airguns Legends M3 Grease Gun Full auto BB Gun

The Umarex Legends M3 Grease Gun Full-Auto BB Gun is a highly detailed replica of the M3 submachine gun — the utilitarian WWII-era American SMG known for its simple, reliable design and distinctive appearance. Powered by CO2 and firing steel BBs at up to 400 fps, the M3 Grease Gun delivers an authentic full-auto shooting experience that's ideal for plinking, target practice, and WWII collecting.

Iconic WWII Replica

The M3 Grease Gun was the workhorse SMG of the US military from WWII through the Gulf War, valued for its simplicity and reliability. Umarex's replica captures the M3's distinctive stamped-metal aesthetic, collapsible wire stock, and compact profile with impressive accuracy. The full-metal construction gives it the authentic weight and feel of the original.

Full-Auto CO2 Action

The M3 fires in full-auto mode, delivering a realistic cyclic rate that makes plinking sessions genuinely exciting. A single 12g CO2 cartridge powers the action, providing consistent velocity and reliable cycling. The drop-free magazine holds 30 steel BBs and reloads quickly for continuous shooting.

Collapsible Wire Stock

Like the original M3, the Umarex replica features a functional collapsible wire stock that extends for shouldered shooting or collapses for compact carry. This feature adds to the authentic handling experience and makes the M3 one of the most faithful replicas in the Legends lineup.

Perfect for Collectors and Plinkers

Whether you're a WWII history enthusiast, an airgun collector, or simply looking for a fun and affordable shooting platform, the Umarex M3 Grease Gun delivers exceptional value. It's safe for backyard use with a proper backstop and economical to shoot with widely available CO2 cartridges and steel BBs.

Available at Glenwood Springs Outdoors — your local airgun and shooting sports retailer in Glenwood Springs, Colorado.