The C prefix is consistent with a 1941 build, even with an early '42 made barrel (will take corrections here, Homer and Muffer?) But the woodwork is all later made Slaz and I don't think original to the rifle. Even in wartime production, fitment was much better than seen here. The metalwork seems very good and all matching... does it look like it's been refinished? The nosecap should be numbered, so I would be inclined to say it had been sporterised previously and re wooded. If the foreend is early '43 it may not have the copper recoil plates fitted.
My opinion.... Overall a very nice but I think obvious rework. Barrel condition might give a better idea of it's prior use. Check for the recoil plates.