76 mm Divizionnaya Pushka obr. 1942 goda (ZIS-3) was one of most important (and most numerous) artillery piece in Red Army's wartime arsennal and one of the most widely exported Soviet guns. Fully capable to be used both as field and anti-tank gun, besides the basic towed version was also used in SU-76 assault gun.
Russia, 76 mm Divizionnaya Pushka obr. 1942 goda ZIS-3 (76 mm Divisional Gun model 1942 ZiS-3)
GAZ-68 KSP-76 was a prototype of lightweight wheeled assault gun intended for reconnaissance and airborne units. It combined chassis of GAZ-51/GAZ-63 truck (already developed but not yet produced) and ZiS-3 76mm gun in the armored bodywork.
GAZ-M1, commonly called 'Emka' (The 'M') was a late 1930s Soviet passenger car, a distant development of GAZ-A - itself a license-built version of Ford-A and of more modern Ford-B. It led to number of follow-on models, including GAZ-M11, a half-track GAZ-VM, GAZ-A Sport and GAZ-GL1 racing cars, while it's chassis was used in FAI-M1 and BA-20 armoured cars.
FAI-M was a version of FAI armoured car using chassis of GAZ-M1 (instead of GAZ-A used in basic FAI model).