| Year | 1931 |
| Weapon Type | Medium Anti-Aircraft Gun |
| Origin & Designer | Germany-Russia/Rheinmetall-Factory No.9 |
| Numbers Produced | 3.821 |
| Crew | 7 |
| Calibre | 76.2mm 76.2x558R) |
| Elevation | -2° to +82° |
| Traverse | 360° |
| Breech | Vertical Wedge |
| Recoil | Hydropneumatic |
| Gun Sight | [@gun_sight] |
| Gun Mount | Cruciform |
| Carriage | Two Wheeled Axle |
| Trailers | [@trailers] |
| Gun Shield | [@gun_shield] |
| Armoured Plate | [@armoured_plate] |
| Barrel Length | 4.191mm (L/55) |
| Overall Length | 6.70m |
| Width | 5.26m |
| Height | 5.30m |
| Weight | Weight in Traction: 4.970 kg Weight in Action: 3.750 kg |
| Round Weight | 6.5 kg |
| Muzzle Velocity | 813 m/s |
| Feed | [@feed] |
| Magazine Capacity | [@magazine_capacity] |
| Practical Rate of Fire | [@practical_rate_of_fire] |
| Rate of Fire | 20 r.p.m. |
| Maximum Rate of Fire | [@maximum_rate_of_fire] |
| Maximum Ceiling | 9.250m |
| Maximum Ground Range | 14.500m |
| Maximum Range | [@maximum_range] |
| Armour Penetration | 78mm @ 500m @ 30° |
| Traction | Horse Drawn & Motorised |
| Variants | [@variants] |
| Notes | The 76mm 3-K was a Rheinmetall designed anti-aircraft gun and was built under licence in Russia. It was the first medium anti-aircraft gun used by the Soviet army and issued to heavy regiments with the national air defense force and to infantry divisions. |