Some captured 7TP tanks was armed with germans MG machine-gun.
(Picture from book T.L.Jentz, W.Regenberg Panzer Tracts 19-1 "Beute-Panzerkampfwagen. Czech, Polish, and French Tanks captured from 1939 to 1940")
(Picture from www.luftwaffe.be)
Germans modified 7TP tanks in Soviet Union. Minsk area, 1941.