| Year | 1937 |
| Weapon Type | Heavy Gun |
| Origin & Designer | Russia/Petrov |
| Numbers Produced | 6.884 |
| Crew | 9 |
| Calibre | 152.4mm (152x260R) |
| Elevation | -2° to +65° |
| Traverse | 58° |
| Breech | Interrupted Screw |
| Recoil | Hydropneumatic |
| Gun Sight | [@gun_sight] |
| Gun Mount | [@gun_mounts] |
| Carriage | Split Trail |
| Trailers | [@trailers] |
| Gun Shield | 3.5mm |
| Armoured Plate | [@armoured_plate] |
| Barrel Length | 4.412mm (L/29) |
| Overall Length | 8.18m |
| Width | 2.35m |
| Height | 2.27m |
| Weight | Weight in Traction: 7.930 kg Weight in Action: 7.270 kg |
| Round Weight | 43.56 kg |
| Muzzle Velocity | 655 m/s |
| Feed | [@feed] |
| Magazine Capacity | [@magazine_capacity] |
| Practical Rate of Fire | [@practical_rate_of_fire] |
| Rate of Fire | 3-4 r.p.m. |
| Maximum Rate of Fire | [@maximum_rate_of_fire] |
| Maximum Ceiling | [@maximum_ceiling] |
| Maximum Ground Range | [@maximum_ground_range] |
| Maximum Range | 17.230m |
| Armour Penetration | [@armour_penetration] |
| Traction | Motorised |
| Variants | [@variants] |
| Notes | The ML-20 was developed to replace the M.1910/30. The M.1910/30 was an up-dated version of the old M.1910 howitzer and was considered obsolete for use in modern warfare. The M.1910/30 still had problems with mobility, elevation and traverse and these faults were to be fixed with the development of the new ML-20. The new weapon was classed as a gun/howitzer and recognised as being one of the best Soviet artillery pieces of the Second World War. It was issued at army level and served in heavy regiments. |