7.5 cm Pak 40

7.5 cm Panzerabwehrkanone 40
A Pak 40 75 mm anti-tank gun, displayed in the Museum of Military History, Vienna.
Type	Anti-tank gun
Place of origin	Nazi Germany
Service history
In service	1942–1945
Used by	Nazi Germany Finland Kingdom of Romania Kingdom of Hungary[1] Kingdom of Bulgaria Norway (postwar) Portugal (postwar)
Wars	World War II Vietnam War Indonesian invasion of East Timor
Production history
Designer	Rheinmetall-Borsig AG
Designed	1939–1941
Manufacturer	Rheinmetall-Borsig AG
Unit cost	12,000 RM
Produced	1942–1945
No. built	23,303[2]
Specifications
Mass	1,425 kg (3,142 lb) in action[2]
Length	6.2 m (20 ft 4 in)
Barrel length	46 calibres: 3.45 m (11 ft 4 in)
Width	2.08 m (6 ft 10 in)[3]
Height	1.2 m (3 ft 11 in)[3]
Crew	6[3]
Shell	Fixed QF 75×714mm R[3]
Caliber	75 mm (2.95 inch)
Breech	semi-automatic horizontal sliding-block
Recoil	Hydro-pneumatic[3]
Carriage	Split trail
Elevation	−5° to +22°
Traverse	65°
Rate of fire	14 rounds per minute
Effective firing range	1,800 m (1,969 yd) direct fire
Maximum firing range	7,678 m (8,397 yd) indirect HE shell

The 7.5 cm Pak 40 (7,5 cm Panzerabwehrkanone 40) was a German 75 millimetre anti-tank gun of the Second World War.

The gun was developed in 1939–1941 and entered service in 1942. With 23,303 examples produced, the Pak 40 formed the backbone of German anti-tank guns for the later part of World War II, mostly in towed form, but also on a number of self propelled artillery such as the Marder series of Panzerjäger.

A modified version of the gun designed specifically for vehicle-mounting was the 7.5 cm KwK 40, which differed primarily in using more compact ammunition, thereby allowing more rounds to be carried inside the vehicles. The KwK 40 armed many of the German mid-war tank and tank destroyer designs such as the Panzer IV, replacing the Pak 40 in the latter role.

The Pak 40 may be referred to as the 7.5/L46, referring to its calibre and the barrel's length in calibres. There were two versions of the KwK 40, which would be referred to as the 7.5/L43 or 7.5/L48.