March 18th, 2017, 05:34 AM
Join Date: Aug 2009
That is odd. Never seen a stamp depression around what is supposed to be the roll mark on any bolt ever. Bolt face,,, hard to tell is those are just milling marks or IF from a hi pressure proof round.. Kinda resembles the hi pressure proof test, but???? Strange.
I'll have to check Lees book, but seem to remember something about some Chinese trigger groups with the TRW mark,,, but IIRC they were upside down or something like that????