85 mm air defense gun M1939 (52-K)

85 mm AA gun M1939: 4,300&nbsp;kg (9,480&nbsp;lb)
85 mm AA gun M1944: 5,000&nbsp;kg (11,020&nbsp;lb)

85 mm air defense gun M1939 (52-К)
85 mm air defense gun M1944 (KS-1)
85 mm air defense gun M1939 (52-К); 85 mm air defense gun M1944 (KS-1)
	; 85 mm air defense gun M1939 (above); 85 mm air defense gun M1944 (below)
Type	Anti-aircraft gun
Place of origin	Soviet Union
Service history
Wars	World War II
Production history
Produced	1939 – 1945
Specifications
Mass	85 mm AA gun M1939:; 4,300 kg (9,480 lb); 85 mm AA gun M1944:; 5,000 kg (11,020 lb);
Length	7.05 m (23.13 ft)
Barrel length	4,645 mm (15.24 ft); L/54.6
Width	2.15 m (7.05 ft)
Height	2.25 m (7.38 ft)
Crew	7
Shell	85×629mmR
Shell weight	9.2 kg (20.28 lb)
Caliber	85 mm (3.35 in)
Breech	Vertical sliding-wedge
Recoil	Hydro-pneumatic
Carriage	2-axle and 4-wheeled with outriggers
Elevation	-3° / +82°
Traverse	360°
Rate of fire	10–12 rounds/min
Muzzle velocity	792 m/s (2,598 ft/s)
Maximum firing range	AA gun M1939 Horizontal:; 15.65 km (17,120 yd) ; Vertical:; 10.5 km (34,450 ft) ; AA gun M1944 Horizontal:; 18 km (19,690 yd) ; Vertical:; 11.6 km (38,060 ft) ;

The 85 mm air defense gun M1939 (52-K) (Russian: 85-мм зенитная пушка обр. 1939 г. (52-К)) was an 85 mm (3.3 in) Soviet anti-aircraft gun used in World War II.