Numbered: 890B. Full size air powered fully automatic BB trainer machine gun that resembles an M2 machine gun with a look-a-like water jacket. These were used for training aerial gunners during World War II and capable of approximately 500 RPM. Powered via hose fed from an air compressor (not included) and was used with .375 caliber bakelite ball BBs. This exact example is photographed and described on page 484 of "Blue Book of Airguns, Thirteenth Edition". Fitted in pivoting steel base. Note: All state and local laws apply. FFL transfer required for individuals in Illinois, New Jersey, Rhode Island as well as various cities/counties where regulations apply. Item may not be sold or transferred to individuals in Delaware.