2.8 cm sPzB 41
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2.8 cm schwere Panzerbüchse 41 or "Panzerbüchse 41" was a German anti-tank weapon working on the squeeze bore principle. Officially classified as a heavy anti-tank rifle, it would be better described, and is widely referred to, as a light... Wikipedia
Breech: horizontal-block
Caliber: 28/20 mm (1.10/.78 in)
Crew: 3
Effective firing range: 500 m (547 yds)
In service: 1941–1945
Length: 2.69 m (8 ft 10 in)
Muzzle velocity: 4,500 feet per second (1,400 m/s)