No, there isn't any mark or stamp on the triggergaurd anywhere. I was thinking about this. In a combat situation, with a rather continuous rate of fire, obviously things got hot real fast (no pun intended). But in shooting single shots, off hand or from the bench, or when hunting, would that well-spaced single shot generate enough heat to cause either a shattering or a peeling of the receiver? Is it at all significant that the only markings on the bolt are the letter "R" under the bolt handle and on the bottom of the bolt? I can see no number, although there a mark that is under the bolt handle that was struck where the curve of that handle begins, rendering it unreadable. However it is not really near the "R". Is this serial number one of the low ones? It's 685268.

Jeesh.
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