I found a Unertl 12X target scope (original 8X scopes weren't available) and we mounted it on the M1903A1 that was getting the NM treatment. (M1941 rifles were built from NM rifles by Marine armorers at their Philadelphia Depot in WW2.) My gunsmith did the NM accurizing to the M1903A1, modified the handguard like the original, and made the mounting blocks. A local machine shop used electrostatic machining (EDM) to drill and tap the holes in the receiver ring for the rear mounting block due to the receiver's hardness.)
How does it shoot? The M1903A1 with iron sights is positively deadly. The 12X Unertl is fitted with the compensating spring that returns it to firing position after each shot and the scope is also dead-on target. The bottom line is that this replica M1941 Sniper's can hold its own with modern, purpose-built precision rifles.
Trivia: During WW2, Marine scout-snipers did not have sniper quality ammo. Instead, they used accuracy-selected lots of M2 armor-piercing (AP) ammunition. On Saipan, two scout-snipers were sent to rescue a Marine company pinned down by a bunch of machine gun nests on a ridge. The scout-snipers maneuvered to a position on a ridge about 1,100 yards away from the Japanese positions and where they could be easily identified. The machine guns were methodically chopping the pinned down Marines to ribbons.
The range was far longer than the sniper had ever shot with this M1941 and so he cranked-in his best guess as far as elevation went. The observer called the shot at 10 feet below the first bunker and four feet off to the side. The sniper adjusted and began walking his shots so that he started hitting by the fifth round. He wiped out the first machine gun nest and then moved to the next. Same thing. Then the next. Then the next. Soon the pinned down Marines began to understand that their tormentors were being killed by this scout-sniper team's deadly shooting. In the end, the living Japanese pulled out and the pinned down Marines cheered their saviors like specators whose team just won the Super Bowl.