| Year | October 1939 |
| Weapon Type | Heavy Regimental Mortar |
| Origin & Designer | Russia/Shavyrina |
| Numbers Produced | 46.600 |
| Crew | 6 |
| Calibre | 120mm |
| Elevation | +45 to +84° |
| Traverse | [@turret_traverse] |
| Breech | [@breech] |
| Recoil | [@recoil] |
| Gun Sight | [@gun_sight] |
| Gun Mount | [@gun_mounts] |
| Carriage | [@carriage] |
| Trailers | [@trailers] |
| Gun Shield | [@gun_shield] |
| Armoured Plate | [@armoured_plate] |
| Barrel Length | 1.862mm |
| Overall Length | [@length] |
| Width | [@width] |
| Height | [@height] |
| Weight | Weight in Traction: 447.6 kg Weight in Action: 280.1 kg |
| Round Weight | 16 kg |
| Muzzle Velocity | 272 m/s |
| Feed | [@feed] |
| Magazine Capacity | [@magazine_capacity] |
| Practical Rate of Fire | [@practical_rate_of_fire] |
| Rate of Fire | [@rate_of_fire] |
| Maximum Rate of Fire | 12 r.p.m. |
| Maximum Ceiling | [@maximum_ceiling] |
| Maximum Ground Range | [@maximum_ground_range] |
| Maximum Range | 6000m |
| Armour Penetration | [@armour_penetration] |
| Traction | [@traction] |
| Variants | 120-PM 43: New shock absorber. |
| Notes | The PM-38 (Polkovoi Minomet) was a heavy mortar which was issued to provide infantry units with heavy fire support. It was a scaled up version of the lighter 82mm mortar and could fire a heavy bomb at a range of 6000m. It was transported on a similar limber as the 107mm mortar and could be found at battalion and regimental level. |