The likelihood of a 1944 03A3 having been issued to a US combat unit is slim to none. If it saw hostilities at all it would've been in the hands of a poor ally or rear echelon commandos, but given it's really nice condition probably not that either. Their chief claim to fame was their ridiculous low price in the postwar surplus market, and their chief purpose in life was as the basis for cheap sporterizations. They put a lot of venison on the table in the 50's-60's.
The 03A4's weren't singled out for sterling accuracy. They were a stopgap measure because the Army hadn't thought ahead for a sniper rifle. Their chief claim to fame was it's ease of sporterization. A buddy of my Dad's got one by dumb luck from the DCM for $20 and was cockahoop because it was already set up for scope use.
Someone truthfully said more A4's exist today than there were in 1945.
