Guns75 mm Gun M1897A475 mm Gun M1897A475 mm Gun M1897A4Caliber75 mmVehicles 3193719381939194019411942194319441945T12 GMC86Dec 1941 – Apr 1942M3 GMC (M2A3 mount)2,116Nov 1942 – May 1943≈ Mar 1943 – May 1943≈ Jul 1943 – Aug 1943≈ Jul 1943 – May 1945≈ Nov 1943 – Jun 1945≈ Jun 1944 – May 1945M3A1 GMC