Barrel came loose during shooting

chemo

chemo

CGN Ultra frequent flyer
Rating - 100%
157   0   0
Just noticed a malfunction on my AR that I had never even heard of...

The barrel unscrewed itself from the barrel extension. It wasn't unscrewing because the gas tube wouldnt allow it to turn any more, but it was unlocked.

How do I fix that? Red loctite is certainly useless, considering the temperatures the chamber reaches.
Unpon repair, if possible, chamber will be spec'ed with gauges I have on hand.


EDIT: I know you guys are really dead set on bashing NEA, but it isn't one, sorry
 
Last edited:
sounds like maybe it just wasnt tight enough when it was assembled, hard to tell without it in my hands, what brand is it?
 
just to clarify:
-nut is still tightly on, nothing broke, the barrel just unlocked from its extension.
-barrel maker is not NEA, sorry to deceive you guys
 
Dsiwy said:
remove the gas tube and tighten the nut "someone did not torque it down properly"
Click to expand...
He said the actual barrel is coming out of the barrel extension.

Without saying names, how old is the rifle? Was it one of the first ones? If so, I can tell you exactly what the problem is.
 
the rifle itself has been through numerous incarnations, but this is a new barrel, about 250 rounds through in one sitting :)
I'd really just rather just fix it myself
 
chemo said:
just to clarify:
-nut is still tightly on, nothing broke, the barrel just unlocked from its extension.
-barrel maker is not NEA, sorry to deceive you guys
Click to expand...

blaxsun said:
Lol. So how old is the OP's NEA? ;)
Click to expand...

give it a rest, lets help people with issues,

to the OP im not sure how the barrel would come loose if the nut was properly torqued... are the threads ok at least? then sure just tighten it all up, if the threads are even slightly off looking I would have a profesional gun smith check it out
 
my guess is that you will probably need to send it back.

here is an excerpt from a machinist forum:

I have a S&W M&P15T AR-15. Recently, the gun's zero started bouncing around. When I investigated, I noticed that the barrel was "loose" as in - I could rotate the barrel 10-15 degrees along the axis of the barrel. I disassembled the rifle expecting something related to the barrel nut. When the gas tube was removed, the ENTIRE barrel simply screwed out of the rifle leaving the extension in the upper. I am a novice with firearm maintenance and disassembly, but from what I have seen, these two items are NOT supposed to come apart, but mine certainly did.

S&W is sending me a shipping label and they say that they will fix it for free. We will see. The bad news - I was sorta looking forward to learning more about how to keep these guns going. This one has about 2-3k rounds through it. Way too few for this sort of problem to develop.
 
can you tell if there is a barrel extension pin? that would be my closest guess to the problem...

here is how it would look if it was buggered.
3432454281_3ceb85ca65.jpg
 
Whoa. Is that an S&J barrel ? I've heard of that happening and heard they are very good to service it.

From what I understand, the way the barrel is screwed into the extension will set your headspace. As such, it's not really user serviceable.
You would need to do special measurements with special tools to set it back in correctly (and safely), and probably some special tools to tighten it.

It needs to be sent to a smith qualified to do the work. Better yet, warranteed by whoever made it.

Can't say I'm expert enough to be right about this, but just giving the OP something to think about.
 
I am not saying that is an S&J barrel but if it is contact Simon there and he will take care of you. I had that happen with one before (not while shooting) I contacted them and Simon was quick and more then willing to help me out. He wants to know about these things so they can make the right moves to make sure it won't happen anymore. They are great Canadian company with a great product. I still use their barrels with no problems and their customer service is top notch.
 
indexing pin and gas port must line up perfectly.not sure about this but a new barrel may be the only solution.
 
OP - By any chance did you remove a muzzle device from this barrel? If you did and did not clamp the barrel, but rather the receiver, you could have loosened it.


And for people that don't know; the pin on the barrel extension was never intended as a locking pin. It's sole function is to index the barrel properly in the receiver. Some companies do drill into the threads and set the pin into them, but that was never the intended design of the pin.
 
You must log in or register to reply here.
Back
Top Bottom