Upper Receiver????

[A5BLASTER]

I remember the 6.5 Grendel required a higher barrel torque than the 5.56. I'll quote LRRPF52:

Bill A. found that at least 60ft-lbs for the 6.5 Grendel worked best in testing across a wide fleet sample of rifles when he was ironing out all the details back in the days when it was under development.

I use a lot of torque on 6.5 Grendel and AR10s.

They are different animals than 5.56 NATO in many ways.

Yes but that is Bill dealing with putting together rack grade rifles for sale and trying too find a moa standard for his guns.

I have seen posted the mil spec is 30 to 90 and I have also seen posted 40 to 80. And that's to find the correct alignment for the gas tube.

With the guns we build and enjoy on this fourm, as long as the barrel nut doesnt need to be aligned for the gas tube. There is zero need too use high lbs of torque. 35 to 45 lbs of torque is more then enough.