05-29-2013, 02:52 AM
I just recently bought a second hand barrel that hadn't been used. It was ordered early in 2012 and delivered in the summer of 2012. The guy said it was a Alexander Arms barrel (Chrome lined Mid length gas port 1:7.5 twist rate 9/16 x 24 threads) , I looked at it and it has no markings but what looks like a jj. It doesn't have 6.5 Grendel or twist rate or nothing. Anyone able to verify if they have similar jj marking on their chrome moly Alexander Arms barrel?