ℹ️ ➖➖➖ The Bofors 40 mm gun, often referred to simply as the Bofors gun, is an anti-aircraft autocannon designed in the 1930s by the Swedish arms manufacturer AB Bofors. The new 40 mm design used a larger 40×365R round firing a slightly lighter 870 g shell at a much higher 1,030 m/s (3,379 fps) muzzle velocity. The rate of fire was increased to 240 rounds per minute (4.0 rounds per second), similar to the German Flak 43. Additionally, the carriage was modified to be power-laid, the power being supplied by a generator placed on the front of the carriage. The first version was produced in 1947, accepted in 1948 as the "40 mm lvakan m/48", and entered Swedish service in 1951. Additional changes over the years have improved the firing rate first to 300 rpm (5.0 rounds per second), and later to 330 rpm (5.5 rps). And the introduction of a 40mm proximity fuzed round in the early 1970s gave the gun system a new lease on life.
📑 ➖➖➖ Air Force and Anti-Aircraft Defence of Bosnia and Herzegovina are equipped with an ex-JNA L70 variant. In the 1970s Zastava Arms acquired from Bofors license to produce L/70 version together with a laser-computer group. Ammunition 40mm for L/70 is locally produced for domestic use and export in Sloboda Čačak.

▪️🛠 Designer Bofors Defence
▪️✅ Designed 1930
▪️🛠 Manufacturer Bofors Defence (1932–2000)
Zastava Arms (1970–present)
United Defense Industries (2000–2006)
BAE Systems AB (2006–present)
▪️⬇️ Mass L/70: 5,150 kg (11,350 lb)
▪️📏 Length L/70: 6.3 m (20 ft 8 in)
▪️📏 Barrel length L/70: 2.8 m (9 ft 2 in)
▪️↔️ Width L/70: 2.3 m (7 ft 7 in)
▪️↕️ Height L/70: 2.4 m (7 ft 10 in)[2]
▪️👤 Crew 4 (dependent on use)
▪️⚔️ Shell Complete round: L/70 40×365mmR
Shell weight 0.9 kg (2 lb 0 oz)
Calibre 40 mm L/60–70 (actual length varies from 56 to 70 calibres, based on model)
Barrels 1 or 2
▪️ ↪️ Carriage 522 kg (1,151 lb)
▪️ ↗️ Elevation L/70: −20°/+80° (57°/s)
Traverse Full 360°
L/70: 92°/s
Rate of fire L/70: 240[1]-330 round/min
▪️⏭ Muzzle velocity L/70: 1,021 m/s (3,350 ft/s)
▪️🔝 Maximum firing range L/70: 12,500 m (41,000 ft)

Ref: Wikipedia.