In a no wind situation with the sight centered on its index and the range properly set, the point of aim is the point of impact when original WWII USGI ammunition is used. It's fun to shoot from as far back as 200 yards and absolutely pound a 55-gallon drum into submission. Most rounds fired full-auto will actually hit the drum if short bursts are used, and most of those will be in a area 2-3 feet in diameter. This is all the more impressive to me as the gun is heavy (like any TSMG), featuring a heavy rapidly reprocating mass (the bolt), and I don't get the chance to practice much!
Even when fired semi-auto from a sandbag rest, accuracy is excellent at 25 and 50 yard ranges.
My question has to do with factory targeting: how was this done so precisely as there does not seem to be any provision made for being able to drift the front or rear sights after manufacture? Or, was the original manufacturing to such a standard that this simply was not necessary? Was the compensator rotated left and right until targeting was achieved, and then pinned?
Do you lucky guys with M1 and M1A1 TSMGs notice the same thing with the fixed sights??
Thanks, guys, and best regards!