M3A1 Grease Gun

The M3A1 Grease Gun is a low rate-of-fire submachine gun used by the Pointman of the United States Army and the United States Marine Corps (USMC). The M3A1 is chambered in .45 caliber and comes with 4, 30-round magazines. The gun features a retractable stock, making the gun more optimal in close-quarters combat by decreasing ADS time. Its iron sights are non-adjustable with its sight being fixed at 100m.

The M3A1 was designed to replace the M1A1 Thompson, as it was a cheaper and faster way to manufacture.