1903A4 Thoughts

[Promo]

This is the first time I see the scope on a 1903A4 sniper rifle EP serial matched to the action. Is it a 330, 330C or M73B1 marked scope?

Any Arsenal overhaul stamps on the left side of the stock? A P cartouche behind the trigger guard that you can see?

Edit: just noticed there is a K in the mag cutoff. For what I remember Keystone only made replacement stocks, but no factory supply? If this is correct, the stock cartouches cannot be original.

OT: which manufacturer and year is the G/K.43 rifle, and is the scope mount matching numbers to the rifle?