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Heckler & Koch MP7 vs M3 Grease Gun
Side-by-side technical comparison
Heckler & Koch MP7
Submachine GunsIn production
M3 Grease Gun
Submachine GunsDiscontinued
Overview
Spec
Heckler & Koch MP7
M3 Grease Gun
Production
2001–Present
1942–1945
Units produced
~50,000 estimated
Over 680,000
Specifications
Spec
Heckler & Koch MP7
M3 Grease Gun
Overall length
418 mm (16.5 in) stock retracted, 638 mm (25.1 in) stock extended
757mm (29.8 in) stock extended / 579mm (22.8 in) stock folded
Barrel length
180 mm (7.1 in)
203mm (8.0 in)
Weight
1.5 kg (3.3 lb) empty
3,700g (8.15 lb) empty
Magazine capacity
20, 30, or 40 rounds
30 rounds
Action type
Gas-operated, rotating bolt
Blowback, open bolt
Trigger type
Single-stage
Selective fire (semi/full auto)
Sights
Flip-up iron sights, Picatinny rail for optics
Fixed blade front, flip-up L-type rear (100 and 200 yards)
Calibers
Heckler & Koch MP7
—M3 Grease Gun