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Heckler & Koch UMP vs M3A1 Grease Gun
Side-by-side technical comparison
Heckler & Koch UMP
Submachine GunsIn production
M3A1 Grease Gun
Submachine GunsDiscontinued
Overview
Spec
Heckler & Koch UMP
M3A1 Grease Gun
Production
1999–present
1944–1945
Units produced
—
Approximately 16,000
Specifications
Spec
Heckler & Koch UMP
M3A1 Grease Gun
Overall length
17.5 in (445 mm) stock folded / 27.6 in (700 mm) stock extended
762 mm (stock extended) / 579 mm (collapsed)
Barrel length
8.0 in (203 mm)
203 mm
Weight
5.1 lb (2.3 kg)
3.47 kg (unloaded)
Magazine capacity
25 rounds (.45 ACP)
30 rounds
Action type
Straight blowback
Blowback, open bolt
Trigger type
Single-stage
Selective fire
Sights
Fixed front post, flip-up rear diopter
Fixed blade front, flip-up rear aperture
Calibers
Heckler & Koch UMP
M3A1 Grease Gun