M3A1 “Grease Gun" in 1 Minute #Shorts
The M3A1 Grease Gun, a WWII-era submachine gun chambered in .45 ACP, was designed as a cheaper alternative to the Thompson. Its M3A1 variant simplified the design by allowing direct bolt cocking with the thumb, unlike the original M3's crank. It features a full-auto-only fire mode and a unique safety integrated into the ejection port cover.









