The problem could be solved by use of faster-burning powder, and otherwise, the design was considered acceptable and was standardized as the 105 mm Howitzer M3 on Carriage M3.

[1] Even though the M3 was not mentioned in the February 1944 T/O&E, shortly before the Normandy airdrops some airborne divisions received a 105 mm glider field artillery battalion equipped with them as a supplement to their existing three 75 mm howitzer battalions (designated the M1A1 during World War II).

The weapon was finally authorized as an option by the December 1944 TO&E, and by 1945 was employed by all airborne divisions in the European Theater.

[1] In an assessment written after the war "The cannon company of 1943-45 failed to live up to the expectations of the force designers of 1942.

The main problem was the substitution of towed low-velocity howitzers for the self-propelled versions as originally intended.

"[5] A small number of M3s were supplied via lend lease channels to France (94), United Kingdom (2) and countries of Latin America (18).