Atmed submachine gun | Gun Wiki | Fandom. Caliber
Feed system
20 rounds
Cyclic rate
725rpm. 
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. This is the Atmed submachine gun and was the third George J. Hyde design to be examined by the US military by 1942. The weapon was a more simplified redesign of the Hyde Model 35. Just as all animals become crabs all smg must become thompsons. 45 caliber 725 rpm and a magazine with 20 rounds make it perfectly balanced for br2.