 By March 1944 359 pieces were in service, including 295 in the West, 40 in Denmark and 24 in the East.Some USVs in German service were converted to anti-tank guns, designated 7.62 cm PaK 39(r).The modifications included rechambering for a bigger cartridge, addition of a muzzle brake, and elevation controls moved to the left side of the barrel where the sights resided.