I’m installing the round PRI gen 3 Handguard and I’m having trouble aligning the gas tube hole with the barrel nut. Their website says to torque down to 40-65 ft/lbs but it’s not enough to line up the holes. I’d have to go way over, like 90 ft/lbs to get it to align. Any ideas how to go about it? I’ve loosened and retightened the barrel nut a few times already and it’s always the same position.
- Thread starter bllistc
- Start date
Barrel nut shims. They are made for 5.56 size and .308 size AR's
https://bisonarmory.com/shim-sets/
https://www.spikestactical.com/collections/upper-parts/spikes-308-shim-kit/
https://bisonarmory.com/shim-sets/
https://www.spikestactical.com/collections/upper-parts/spikes-308-shim-kit/
Just realized I have a couple left that came with an aero precision hand guard. Thank you!
Do you have some grease on the threads? That can help reduce the torque necessary to align it. Mine didn't give me too much trouble, so maybe I just got lucky... Shims would be the next logical step if grease doesn't get you there.
So I ended up calling PRI and asked them about it. They said the 40-65 ft/lb is just a reference and its ok to go over that by a little if needed for alignment. I ended up getting it aligned properly at about 85 ft/lbs. Backed it off and tightened again and got it to the same hole at 60 ft/lbs so I didn't need the shims. I did put anti-seize on the threads.
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