| Year | 1941 |
| Weapon Type | Medium Gun |
| Origin & Designer | Britain/State Factories |
| Numbers Produced | 5000 |
| Crew | 10 |
| Calibre | 140mm |
| Elevation | -5° to +45° |
| Traverse | 60° |
| Breech | Wellin Screw |
| Recoil | Hydropneumatic |
| Gun Sight | No. 7 Dial Sight |
| Gun Mount | [@gun_mounts] |
| Carriage | Split Trail |
| Trailers | [@trailers] |
| Gun Shield | [@gun_shield] |
| Armoured Plate | [@armoured_plate] |
| Barrel Length | 4.190mm (L/30) |
| Overall Length | 7.52m |
| Width | [@width] |
| Height | [@height] |
| Weight | In Action: 5.850 kg |
| Round Weight | 45.36 kg |
| Muzzle Velocity | 510 m/s |
| Feed | [@feed] |
| Magazine Capacity | [@magazine_capacity] |
| Practical Rate of Fire | [@practical_rate_of_fire] |
| Rate of Fire | 2 r.p.m. |
| Maximum Rate of Fire | [@maximum_rate_of_fire] |
| Maximum Ceiling | [@maximum_ceiling] |
| Maximum Ground Range | [@maximum_ground_range] |
| Maximum Range | 14.870m |
| Armour Penetration | [@armour_penetration] |
| Traction | Motorised (AEC Matador) |
| Variants | [@variants] |
| Notes | The 5.5in gun was first introduced in 1941 and replaced the 4.5in as the standard medium gun. The 4.5in lacked the explosive power needed due to the low HE content of its shells. It shared the same carriage as the 4.5in Mk. II and a similar recoil system to the 6in howitzer. The gun was a complete success and it had a long career serving in British and Commonwealth medium artillery regiments. |