Yea, using this scope in combat must have been a real challenge, especially in PTO. Amazing that Carlos H. was still using them with success in Nam, but the Marines have always made the best of what they had. Personnally, the PU's he took on, were probably a better rifle for the environment in which they were used IMO. They were consistent with what Jim says, compact, rigid and fairly quick to detach. The basic Mosin comes with the only tool you would need, a combo tool with a screw driver and firing pin protrusion tool. Time to remove, about 10-15 seconds. Remember, Carlos said on video tape that after I shot him and saw the bullet had gone thru the scope and into his eye, "it occurred to me that I was in his crosshair and had I not been a spit second faster on the trigger, I would not be here"(not exact quote but just of it).
There was a link to a couple groups shot with one of these Repro Unertls, shot by a guy named Mike something in OK. He is gonna use the rifle in the Vintage Sniper matches. They were sub one inch at 100 yds. I wonder if it is the same Mike that was one of the two team members who won overall last time? In that match they used what he stated to be a stock Gibbs A4, with original Gibbs installed barrel and stock and an original Weaver, not Gibbs, scope. I should have one of these repro Unertls any time. Shipped Monday at 5PM.
Looking at a bunch of the pictures from the big VS Match, there were dozens of folks using replicas or real 1903A1 USMC snipers with Unertls. None placed high. CMPhad already allowed other Unertls refitted to be 8X or commercial 8X to be used. I could see a ton of them in the pictures. I thought that they would shine and was surprised a 2.5X weaver on what should be a lesser rifle, Gibbs A4, would come out on top.
On resetting the scope, that can be done very quickly. The problem is forgetting. Having used one quite a bit, I can tell you I have forgotten to reset it about 10-15% of the time. It does not make a huge difference in POI.