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M3 Grease Gun
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Quick Overview
Origin
Production
1942 - 1945
Caliber
Overview
The M3 is a .45 ACP submachine gun developed by the United States during World War II as a cheaper, faster-to-produce alternative to the Thompson submachine gun. Its distinctive appearance earned it the nickname 'Grease Gun.'
Calibers & Ammunition
Dimensions
Overall Length
757mm (29.8 in) stock extended / 579mm (22.8 in) stock folded
Barrel Length
203mm (8.0 in)
Weight
3,700g (8.15 lb) empty
Mechanical
Action Type
Blowback, open bolt
Trigger Type
Selective fire (semi/full auto)
Sights Type
Fixed blade front, flip-up L-type rear (100 and 200 yards)
Magazine Capacity
30 rounds
Additional Information
stock
Folding wire stock
action
Blowback, open bolt, selective fire
barrel
203mm (8.0 in) — four-groove, right-hand twist
magazine
30-round detachable box magazine
variants
M3 (with cocking handle), M3A1 (cocking handle replaced by finger hole in bolt)
rate_of_fire
350-450 rounds/min (M3); 400-450 rounds/min (M3A1)
How does the M3 Grease Gun compare?
Pick any other firearm for a side-by-side spec breakdown.