| Year | 1937 (Mk.II) 1943 (Mk.II LR) |
| Weapon Type | Medium Mortar |
| Origin & Designer | [@designer] |
| Numbers Produced | 10.000+ Mk.II & Mk.II LR (UK Totals) |
| Crew | 4 (Squad Leader, Gunner, Loader & Ammunition Bearer) |
| Calibre | 3 Inch (81.5mm) |
| Elevation | +45° to +80° |
| Traverse | 11° Left & Right |
| Cartridge Weight | [@cartridge_weight] |
| Round Weight | 4.57.2 kg (HE) |
| Barrel Length | 1.300mm |
| Overall Length | [@length] |
| Grenade Types | [@grenade_types] |
| Mount | [@mount] |
| Combat Weight | 57.20 kg |
| Operation | [@operation] |
| Cooling System | [@cooling] |
| Sights | [@sights] |
| Feed | [@feed] |
| Practical Rate of Fire | 8 r.p.m. |
| Maximum Rate of Fire | 12 r.p.m. |
| Blank Cartridge | [@blank_cartridge] |
| Muzzle Velocity | 198 m/s |
| Fuel Capacity | [@fuel_capacity] |
| Minimum Range | 114m |
| Effective Range | [@effective_range] |
| Maximum Range | 1.463m (Mk.II) 2.560m (Mk.II LR) |
| Armour Penetration | [@armour_penetration] |
| Bayonet | [@bayonet] |
| Traction | [@traction] |
| Variants | [@variants] |
| Notes | The early 3in mortars originated were first used in WW1 and this basic design was improved during the interwar years and as a result the ML 3in was the standard medium mortar used by British and Commonwealth countries in WW2 and beyond. Improvements were made during 1942 which allowed for greater range and these were called Mk. II LR (Longer Range) and they were issued in 1943. The ML 3in was issued to mortar platoons at battalion level. |
