Nope, I mean .679.
Underboring just seems to work so much better (atleast for me), a lot more consistent over the chrony, pretty much 0 breaks, and accuracy is about the same, or better. Plus, no rollouts when I'm playing pump.
and a proto barrel = a ul
What if its not the 09 PMR? Those came with 1 piece, like 11" barrels. Since the guy listed UL as seperate, seems to me like its one of the older PMRs. Deadly wind would fix the ugly and heavy problem
it's an 2007 PMR.
I just got it in the mail and man what a pretty marker.