03-11-2011, 01:14 PM
I'm not a fan of high barrel nut torque numbers. If I have to go over 60-70 Ft Lbs to get the gas tube aligned I try a different barrel nut. I the case of a proprietary nut, I see several manufacturers are saying just machine the nut for gas tube fit.
80 Ft lbs is a lot of load on the aluminum threads of the upper, there has to be some distortion from that.
80 Ft lbs is a lot of load on the aluminum threads of the upper, there has to be some distortion from that.