barrel nut with broken teeth - Page 1

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[ARCHIVED THREAD] - barrel nut with broken teeth

Posted: 9/21/2014 1:15:09 PM EDT

I am trying to remove an old barrel from an upper receiver. Several teeth on the barrel nut are buggered making it difficult to get a wrench to stay on. How do I remove the nut with the least chance of damaging the receiver?

Posted: 9/21/2014 1:26:14 PM EDT

[#1]

If the barrel nut is toast I would use a pipe wrench with either a proper upper (clamshell) vise or barrel vise. YMMV

Posted: 9/21/2014 1:27:53 PM EDT

[#2]

I agree with the above comment about a pipe wrench! You can also heat the barrel nut up a little bit with a small propane torch

Posted: 9/21/2014 1:38:40 PM EDT

[#3]

Quote History

Quoted:

I agree with the above comment about a pipe wrench! You can also heat the barrel nut up a little bit with a small propane torch

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Be very careful attempting something like this in an aluminum to steel interface. They are gonna absorb heat at different rates. You could very easily mess up the temper on your receiver.

I would put some Kroil on the threads and let it sit for a day or two and go back at it. Try to free up anything in there sticking it together beside torque.

Posted: 9/21/2014 1:39:34 PM EDT

[#4]

Quote History

Quoted:
I agree with the above comment about a pipe wrench! You can also heat the barrel nut up a little bit with a small propane torch

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Rodger that. Sounds like the front sight base will need to come off to replace the barrel nut. I guess the pins are the next challenge.

Posted: 9/21/2014 1:52:29 PM EDT

[#5]

Yes you will have to remove the front sight block I don't remember exactly which way the pins go out but they go in one way to come out the opposite way

Posted: 9/21/2014 2:01:08 PM EDT

[#6]

Unless it's something atypical you will remove the pins by driving them out from the left (small diameter) side.

But some or all Rock Rivers use straight pins instead of taper I have read.

Posted: 9/21/2014 5:55:30 PM EDT

[#7]

Pipe wrench for the win. I know from experience that it will work!

Most ARs with pinned FSBs use taper pins that go in right-to-left, so you have to tap them out left-to-right (and by "tap" I mean "really hammer them" to start). Read BCM's well written instructions for removing their taper pins here. BEFORE you start, make SURE that your FSB has taper pins and not dowel pins (like RRA's have), or that yours doesn't have taper pins in backward (like some makers do).

[ARCHIVED THREAD] - barrel nut with broken teeth

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