12 produced, 10 of which were completed as Grant I. At least 1 of these was supplied to Australia and another was converted to a Grant Scorpion. M3A3 (Lee V) Diesel-engined variant with welded hull. Twin GM 6-71 diesel engines coupled together to make the GM6046 powerpack. Side doors welded shut or later eliminated. 288 built, 49 supplied to the UK and 77 supplied to Brazil. 83 M3A3 hulls completed as Grant II. M3A4 Stretched riveted hull to accommodate the Chrysler A57 multibank engine, made up of five 4.12 litre displacement, 6-cyl L-head car engines (block upwards) mated to a common crankshaft. Displacement 21 litres, at 2,700 rpm. Side doors eliminated. 109 built. Only used for training in the USA. M3A5 Rivetted hull but otherwise as per the M3A3. 591 built, 387 as Grant IIs. Only used operationally once by US forces. 23 supplied to Brazil. M31 Tank Recovery Vehicle (Grant ARV I) Based on M3 chassis, with dummy turret and guns. A winch installed. M31B1 Tank Recovery Vehicle Based on M3A3. M31B2 Tank Recovery Vehicle Based on M3A5. There were 296 total M31B1/B2 vehicles, although the precise quantity of both variants is unknown (it appears that M31B1 was more common). 146 of them were converted from used tanks and 150 from newly built tanks before their acceptance. M33 Prime Mover M31 TRV converted to the artillery tractor role, with turret and crane removed. 109 vehicles were converted in 1943-44. 105 mm Howitzer Motor Carriage M7 (Priest) 105 mm M1/M2 howitzer installed in open superstructure. A gunless version was used as an observation post (OP) vehicle 155 mm Gun Motor Carriage M12 Designed as the T6. A 155 mm howitzer on M3 chassis. 100 built in 1942-1943. M30 Cargo Carrier on same chassis to transport gun crew and ammunition. British Commonwealth service names and variants Grant I M3 and M3A2 with turret to British specification and internal differences, no cupola. 1,211 M3-based and 10 M3A2-based Grant Is supplied. Grant II Final Baldwin production based on M3A3 and M3A5 after US Ordnance ordered them to switch from petrol to diesel production. 381 Grant IIs based on M3A5s were supplied along with 83 based on M3A3s. Grant ARV A single prototype conversion of a Grant I. Turret and hull gun removed and replaced with armored recovery vehicle equipment including winch and jib. A twin Bren light machine gun mount was fitted for