| Year | May 1943 |
| Weapon Type | [@type] |
| Origin & Designer | [@designer] |
| Numbers Produced | 51 |
| Crew | Corporal/Squad Leader + .30 cal M1 Rifle. Pvt/Gunner + .30 cal M1 Carbine. Pvt/Assistant Gunner + .30 cal M1 Carbine. 2 x Pvts/Ammunition Bearers + .30 cal M1 Carbines. Pvt/Driver (Towing Vehicle) + .30 cal M1 Rifle. |
| Calibre | 75mm (75x227R) |
| Elevation | -5° to +50° |
| Traverse | 45° |
| Breech | Horizontal Block |
| Recoil | Hydropeumatic |
| Gun Sight | 29A1 |
| Gun Mount | [@gun_mounts] |
| Carriage | M3A3: Split Trail |
| Trailers | [@trailers] |
| Gun Shield | 6.4mm |
| Armoured Plate | [@armoured_plate] |
| Barrel Length | 1.190mm (L/15.9) |
| Overall Length | 3.94m |
| Width | [@width] |
| Height | [@height] |
| Weight | Weight in Transit: 1.073 kg Weight in Action: 1.009 kg |
| Round Weight | HEAT (M66) 7.39 kg. HE (M48) 6.27 kg. Smoke (M64) 5.56 kg. |
| Muzzle Velocity | HEAT 305 m/s. HE 381 m/s. Smoke 38 |
| Feed | [@feed] |
| Magazine Capacity | [@magazine_capacity] |
| Practical Rate of Fire | 6 r.p.m. |
| Rate of Fire | [@rate_of_fire] |
| Maximum Rate of Fire | 10 r.p.m. |
| Maximum Ceiling | [@maximum_ceiling] |
| Maximum Ground Range | [@maximum_ground_range] |
| Maximum Range | HEAT: 6.400m HE: 8.790m Smoke: 8.7 |
| Armour Penetration | 91mm @ 0 to 6.400m @ 30° (HEAT) |
| Traction | Motorised (Jeep) |
| Variants | [@variants] |
| Notes | The M3A3 was the same gun as the M1A1 pack howitzer but was mounted on a M3A1 carriage. This carriage had pneumatic wheels like the M1A1/M8 and a split trail but was not designed for pack transport. It was supposed to be limbered for high speed towing and to be used as a field howitzer with either horse artillery or mechanized units. |