I have a 1943 Quality Supply w/10/43 Buffalo barrel mixmaster. Rebuilt at the RIA facility, and probably not been used since the rebuild. It was purchased recently through a GB ffl. It has an M2 round top bolt which has an "X" stamped on the top. My worry is this might be a reject bolt for some reason. I've already test fired it at the range and seems to shoot fine, but was wondering........I love M1's and have 4 CMP guns. What are you having problems with?
Yep......probably what you're speaking of......you can plainly see the "X" in the photo I posted above.My understanding was that identified round bolts that did not have other revisions that were to have happened simultaneously. The was a thread on Gunhub.com about it . They should not be a problem. The x was about 1/2inch behind the lug. Is that where yours is?