cm289

Mine is A.O.C.274A, and it also has the “R”. For anyone interested in, here's how it was equipped when originally purchased in 1975: M1 style safety and rocker pivots (since swapped out with vintage 1928A1 paddle-style from Savage) Savage bolt Savage Blish lock Lyman adjustable sight Savage actuator Unmarked compensator that has the front sight dove-tailed in (sight was loose, so I staked it down. Also, comp has a set screw underneath to attach it to barrel). Two piece WH buffer pilot (since replaced with a vintage Savage). Buffer pad appears to be black polyurethane. Mag release appears to be USGI Barrel appears to be WH, with the squared off & sharp fins The only other semi-interesting thing about it is that the "4" in the serial # sits about 1/2 a line lower than the other #s.

I voted “no” but confess to being somewhat ignorant. I have 274A, owned it for about 10 yrs and bought it directly from the original owner. I rarely shoot it, but have never had any problems. Since I haven’t ever shot a “real” Thompson, I guess I don’t know what I’m missing.