12-01-2015, 02:35 AM
I've done this twice on AR barrels it's actually easier than it is with a bolt gun. Measure all your clearences, mark everything,and don't take any more metal than you have to. You don't have to remove much metal at all from the extension to regain the twelve o'clock position for the gas tube. Machinery 's handbook has charts/math for clocking. You should stop at least.0005"short of the calculated value to allow for torquing the extension.
Bolt guns are a little more involved but, it's a shorter version of what goes into chambering and threading the barrel in the first place.
All I'm really trying to say is I wouldn't give up on a good quarter MOA barrel without trying this first.
Bolt guns are a little more involved but, it's a shorter version of what goes into chambering and threading the barrel in the first place.
All I'm really trying to say is I wouldn't give up on a good quarter MOA barrel without trying this first.