Ausf.F2, 4th Kompanie, 1st Abteilung, VIIIth Panzer-Regiment, XVth Panzerdivision, DAK, El Alamein (Egypt), October 1942. The F2 variant was introduced when the 7.5 cm Pak 40 L/46 (2.95 in) was converted into the KwK 40 L/43, a relatively long caliber tank gun, fitted with a muzzle-brake, for reduced recoil. Muzzle velocity was 990 m/sec (3250 ft/sec) with the Panzergranade 39. It could penetrate 77 mm (3.03 in) of armor up to 1850 m (6000 ft). After the first prototype was produced by Krupp in February 1942, production of the F2 started. By July 1942, 175 had been delivered. However, the F2 was soon renamed Ausf.G, and further modifications were applied on the production line, but both types were known to the Waffenamt as the Sd.Kfz.161/1. Some nomenclatures and reports also speak of it as the F2/G version. This version allowed the DAK to keep an edge over the M3 Grant.