Originally Posted by
Bret
Interestingly, the bolt face has a gutter around its edge which I'm guessing is for debris. It's probably on other rifles, but the only time that I've seen it before is on a Zastava M85/M90 5.56x45 bolt. In the picture below, a Windham bolt carrier group is on the left and the Colt is on the right.
That is interesting. I wonder why it is used here and not other Colt bolts. x39 presumed to be dirty? Not enough space on the smaller 5.56 case head?
"We must all hang together, or, most assuredly, we shall all hang separately."
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