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Posted: 4/19/2006 9:01:27 PM EDT
| I read the whole threat above about installing the barrel and such but i was wondering would anyone recomend adding a few dap's of blue lock tite to the barrel nut/ or recievor thread's to ensure it wont come off after you have torqed it to 80 ft pound's? |
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Don't use Loctite anywhere on an AR except on some trigger adjustment screws. It is not necessary. You will later regret it if you do. More damage has been done to AR's trying to get them apart after Loctiteing components than any other cause. The barrel nut will not come loose if properly tightened. The gastube will not allow the nut to move it it ever did come loose. |
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DO NOT TORQUE TO 80 FOOT POUNDS! that is the max torque. not the minimum or set. the minimum is 30 foot pounds which is just slightly more than hand tight. your trying to line up the "sprocket" so the gas tube will fit. that is all. going a little more will just get you into trouble when you try to install the gas tube. |
| It's funny that this thread was here. I was in the process of installing my JP Enterprises handguard and it calls for RED loctite to hold the barrel cup on. I personally though this was a bad idea so, a little black RTV keeps the cup in place and keeps the aluminums from cold welding. For the barrel nut I'd think any decent hi-temp grease would be ok. All you're trying to do is keep the steel and aluminum from cold welding. I, personally, use finish line teflon grease since I have it on hand for servicing my bikes. |
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DO NOT use loc tite on barrel nut. I just changed a barrel on my brother's Colt AR 15 factory upper that was too tight used a military barrel wrench and buggered up all lugs on the nut and still couldn't break the nut , Had to use a Dremmel tool and cut the delta ring in two pieces and also the barrel nut in two pieces to get it off , cut down almost to threads and use a chisel and finish the split with not too much trouble and no damage to threads. when installing new one use a little of anti sieze compound on threads and don't over tighten. Probably wouldn't hurt to snug up and then back off a few times and then clean threads and lube up angain before final instalation. Just dont put on dry or you may have to do the same thing I did next time. It cost me a new barrel nut , weld spring, and Delta ring . I have in past just tight enough to get gas tube to align up. you could break it loose with bare hand , couldn't get it to next notch without realy bearing down on it so I backed off and had no trouble at all with it. It is not like a bolt rifle , the lugs on the bolt lock up with the barrel extension and that is where all pressure is . James O |
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