· parts, the UMP45 weighs just 4.6 pounds. The weights of other widely deployed .45ACP SMGs vary...
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· parts, the UMP45 weighs just 4.6 pounds. The weights of other widely deployed .45ACP SMGs vary from 10.5 pounds for the Ml 928M Thompson, 7.6 pounds for the M3AI "Greasegun",
