Pak 57 Anti Tank gun
Pak 57
Type	Anti-tank gun
Place of origin	Switzerland
Service history
Used by	Switzerland
Wars	none
Production history
Designed	1940s
Specifications
Mass	716 kg (1,579 lb)
Crew	3-4[1]
Cartridge	Fixed HEAT 3.15 kg (6 lb 15 oz)[1]
Caliber	90 mm (3.5 in)
Rate of fire	10 rounds per minute
Muzzle velocity	600 m/s (2,000 ft/s)
Effective firing range	300 m (330 yd)
Maximum firing range	1,000 m (1,100 yd)[1]

The Pak 57 was a Swiss anti-tank gun used by the Swiss army.

After the second World War, Switzerland sought to retrofit its armed forces. Their anti tank guns at the time were mostly older German 75mm guns that were not sufficient for their needs. The Pak 57 and Pak 50 designs were the first domestic designs intended to replace them. The Pak 57, though slightly heavier than the Pak 50, had a very short barrel for an anti-tank gun and was much lighter than foreign designs such as the 90 mm Gun M1/M2/M3. The HEAT round could penetrate 250 mm (9.8 in) of armor at 1 km (0.62 mi).^[1]

Both the Pak 50 and Pak 57 served with the Swiss fusilier battalions.^[2]