Hey all seems i can't find much in the way of 75mm M4A1 photos from the Ardennes offensive. Were they used, and if so in which Armoured Division? If this is so, would anyone have any markings for such? Thanks for any help

Have no idea on the markings or specific use in the Ardenne but M4A1(75) were documented to survive till near the end of the war. In one instance even a direct vision M4A1(75) was found in Germany 1945.

It's possible, even likely, that there were some 75mm armed M4A1s in the Ardennes. There are several photos showing 75mm armed M4s in both regular and composite hulled versions at the Bulge.
I've also read accounts of the battles around Singling in early December fought by the 4th AD which mentions their rapidly aging tanks. The 4th AD didn't use any really unusual markings, so it's pretty straight-forward to build a replica of one of their mounts.

Thanks lads. Was aware of the use of composite hull M4s and standard M4s but the 4AD info can be put to good use war machine. Ta!