Bofors 57 mm M54
External image Bofors 57 mm m/54 Bofors m/54
Type	Anti-aircraft gun
Place of origin	Sweden
Service history
Used by	Sweden & Belgium
Production history
Designer	Bofors
Specifications
Mass	8.1 t (8.0 long tons; 8.9 short tons)
Barrel length	3.42 m (11 ft 3 in) L/60
Shell weight	2.6 kg (5.7 lb)
Caliber	57 mm (2.2 in)
Elevation	+90 ° to –5 °
Traverse	360 °
Rate of fire	120 rounds/min
Muzzle velocity	820 m/s (2,700 ft/s)
Effective firing range	4,000 m (4,400 yd) against aircraft
Maximum firing range	14,500 m (15,900 yd) horizontal
References	Brassey's[1] & Jane's[2]

The Bofors 57 mm m/54 (57 mm luftvärnsautomatkanon m/54 or 57 mm lvakan m/54) was a wheeled^[3] automatic anti-aircraft gun for land based use produced by Bofors and developed from the similar Bofors 57 mm m/50 naval artillery gun. The gun was developed in the 1950s and fielded by both the Belgian and Swedish military.

The m/54 fired a 2.67 kg (5.9 lb) high explosive projectile at a muzzle velocity of 880 m/s (2,900 ft/s) and a rate of fire of 160 rounds per minute. Weighing in at 8.1 t (8.0 long tons; 8.9 short tons), the m/54 had an effective range of 4,000 m (13,000 ft).^[4] The ballistics of the m/54 at practical air defense altitudes were not particularly superior to those of the Bofors 40 mm AA gun, resulting in relatively few sales of the m/54.^[5]

• Bofors 57 mm Naval Automatic Gun L/60
• Bofors 57 mm Naval Automatic Gun L/70

• Christopher Foss (Ed.), Jane's Armour and Artillery 1981-82, London: Jane's Publishing Co. Ltd., 1981.

• www.navweaps.com page on the Bofors m/50 naval 57-mm AA gun