it had a Cutts mounted on it (had posted a pic way back then) .
Well, this indicated to me a rebarrel - possibly at the arsenal (MR stamped on butt).
I don't know much about this comp but it has a set screw on the bottom. Threads on the smooth 28 barrel (that it was rebarreled with at some time) and then tighten the set screw.
I thought an M1 should look totally like an M1 so I remove the Cutts. Low and behold underneath it is a cut in the topside of the threads for a pin to hold either the ring sight or an earlier type compensator. Digging through my spare parts sets I grab two ring sights to test fit.
Now here is what I thought was weird.
The cut in the threads was not a straight perpendicular cut but somewhat angled. So were the pin holes through both ring sights!
I take a brass drift and tap on the ring sight and it was a good fit. Pin hole lines up great. Sights are centered and after test firing I see that they are dead on at 100yds.

Lucky me huh?
Anyway kind of nice to be able to use either the compensator or have the look of the shorter M1.
Now if and when the AWB dies I may look into a cheap drum to convert to the M1 latch - after reading that post.
