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Posted: 11/8/2007 5:06:22 AM EDT
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What are the potential repercussions of low barrel nut torque? I have one that goes from maybe 10 ft lbs to way too much between two adjacent gas tube holes… If I leave the torque value low… what are the potential issues? |
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Too - low? Barrel wobbling (very very poor accuracy) and potentially falling out. Did you grease the threads with a little bit of Moly-disulfide grease (the version WITHOUT graphite)? Did you to the Torque 3 times (last one being the final) to properly seat the threads? |
| You may need to exceed the recommended torque range on some uppers and lowers. In mating my Larue Stealth Upper to my Larue Gooseneck, I had to almost double the torque spec to get to the next hole from hand tight. It happens sometimes. Better too tight then too loose. |
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196. That's what you get when you have New-ARGuy hanging off the end of the barrel wrench. 
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I have discovered that if you tighten the nut down and then losen it and then completely take it off a few times that you can usually get it where the teeth line up at a reasonable torque. Keep trying after after completely taking it off. It sometimes will magically line up. Another trick is to feed the gas tube in from the receiver side and use that as a guide as you are tightening to know exactly when the teeth are lined up. |
Sweet rig!!!!! 
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Please forgive me for the all caps but this always bugs me, so to hopefully drive this home: YOU CAN ADJUST THE FINAL REQUIRED TORQUE ON THE BARREL NUT BY TORQUING (TO 35 FT-LBS) AND LOOSENING THE NUT REPEATEDLY UNTIL THE NEXT HOLE/NOTCH WILL ALIGN WITH THE GAS TUBE, WITHOUT EVER GOING OVER 80 FT-LBS OF TORQUE. If the nut ends up aligned on the first try, you are good and can stop, you don't need to loosen and re-torque. If it takes 2, 3, 4, or even 10 tries, so be it. Just don't be an idiot and over torque the barrel nut on the first go. Grease also helps here and is well advised. |
+1 to the above and Forest's comments farther up the page. The key here is: - Plenty of grease. - If short of alignment, repeat the tightening/loosening sequence until alignment is achieved. |
Yep, this is the right way to do it without forcing anything or exceeding torque limits. Grease it up and tighten just a bit further after each time you loosen the nut... 
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I'd guess its similar to lining up a LaRue. Get it close and check the rail alignment, and sneak it up as you tighten the barrel nut, checking the rail alignment as you go. |
so it wont be a speedy process and will require some guess and test work. |
I've never done a YHM so I can't say. It usually takes me 2 or 3 checks to get a LaRue right on. |
well basically the way the barrel nut attaches to the railed hand guard with the set screws it would be the same as if it was one entire piece. the grips and nut always line up on the same spot when the 2 set screws are put in, and for some reason there is sill a jam nut (which i like the fact that it seems to be over engineered a little bit, especially for being the cheapest railed grip on the market it seems). all of the peaces are shown on the bottom of the page here. |
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