Saw cut gas tubes on ww11 winchester garands.

Was this done at factory or arsenal repair? My April 1943 has this cut.What is the history of this in ww11?

This was done after the fact as a measure to tighten up loose gas cylinders. When they left the factory, they were tight...

The problem started with some SA barrels that were not in specs and the best way to correct this situation was to saw cut the cylinders to make them tighter on the barrel. This was not done at the factory. Some gas cylinders were cut straight while others were cut at an angle, all depends on who performed this modification.

During post war match shooting some shooters wanted these tight cylinders. Sometime
around 1953 or so, a number of these saw cut cylinders were again modified with a small weld tack on each side while in the serviceAttachment 89483

RCS is correct, the first type of cut was vertical, then was changed to slant-cut. After the war, rebuilds reclaimed some of the slants with a tack weld, but the verticals were discarded.

So it would be correct on my May 1943 winchester narrow gas tube,.829 wide front site and P.O. gas plug,the Operating rod is slant field cut radius. Winchester barrel gauges T.E.1+ M.E.1+. This would not be detrimental to its value? All other parts appear right,stock and buttplate to. I was offered $ 2k ,but I think that was lowball.