Poland acquired a license for this type of gun in November 1935. We received a batch of 68 reference units from the manufacturer, along with assistance in establishing domestic serial production.
The Polish-produced versions were adapted to the capabilities of our national industry. They differed from the original design by replacing cumbersome and technically complex wedge-type connections with standardized splined shafts.
The Bofors 40 mm gun was used by the armed forces of many nations on both sides of the conflict during the Second World War. It also saw service in the German army, which acquired units captured during the campaigns in Poland and France. In German nomenclature, the gun was designated as the FlaK 28.
Caliber: 40 mm
Ammunition: 40x311R
Weight: 1730 kg in firing position,
2400 kg in transport configuration
Wheelbase: 3290 mm
Track width: 1500 mm
Barrel weight: 193.7 kg (bare), 220 kg (with breech mechanism)
Barrel length: 2250 mm (including breech housing)
(of which the rifled section is 1932.5 mm)
Average barrel recoil: 200 mm
Elevation range: -5° to +90°
Azimuth range: 360°
Feed system: 4-round clip
Rate of fire: 100–120 rounds/min (theoretical),
60 rounds/min (practical)
