bnz 41 correct features?

Hello, I just picked up a Russian capture bnz 41 with a flat buttplate laminated stock and a milled trigger guard. Is that a correct stock or should it have a cupped buttplate? Should the trigger guard be stamped or milled?

I have a cupped buttplate stock and a stamped trigger guard and was thinking of installing those if they would be more correct. Thanks for any guidance, Doug

bnz 41 should have a cupped butt plate stock. Stamped trigger guard wasn't used till 1944.
Sarge