Anyone else have trouble removing the barrel nut from an SA15.7?

[DaveMachine]

I've been struggling to budge this thing - I've tried heat and penetrating oil to no avail. Next step is dry ice with a little bit of heat, failing that I'm gonna cut the delta ring off and hit it with a pipe wrench.

Thoughts?

 

[Blastattack]

Pipe wrench is never the solution. Are you using a proper and decent quality barrel but wrench to remove it?

 

[DaveMachine]

Proper? Yes. Decent quality? That's debatable - I forget the make but it's probably Chinesium. Either way, I've but a fair amount of force on the nut with a breaker bar and it ain't moving.

 

[Kaberday]

My SA 20 barrel net was tuff, used some much force I thought I was going to break some thing for sure, but she came lose.

 

[Blastattack]

Proper? Yes. Decent quality? That's debatable - I forget the make but it's probably Chinesium. Either way, I've but a fair amount of force on the nut with a breaker bar and it ain't moving.

Try a rubber mallet. Sometimes shock is more effective that pure torque.

 

[CobraGT]

My SA 20 barrel net was tuff, used some much force I thought I was going to break some thing for sure, but she came lose.

Same, my SA20 was on there pretty solidly, but did come off without the need for heat or oil. Haven't tried removing my SA15.7 barrel yet.

Dave, you sure you're turning it the right way?

 

[redshooter]

I soaked a rag and froze it. Then using my heat gun got the nut nice and hot, then stuffed the frozen rag into the front of the Receiver/Barrel Ext, waited a few seconds then put the torque to it...off it came.

 

[DaveMachine]

Well, that was an ordeal - I've never seen a barrel nut torqued so tightly. It's off now, but the barrel will not come out of the receivervand I'm not sure why. The only other time I've seen that is from someone that used loctite retaining compound on a barrel extension/receiver interface.

 

[greentips]

Well, that was an ordeal - I've never seen a barrel nut torqued so tightly. It's off now, but the barrel will not come out of the receivervand I'm not sure why. The only other time I've seen that is from someone that used loctite retaining compound on a barrel extension/receiver interface.

You probably need to heat up the receiver to pull the barrel. HK MR receivers are intentionally undersized and the upper needs to be heated to install/disassemble the barrel (for the aluminium to expand), I image Colt may have a tight fit so following the same strategy will most likely work.

The injunction hearing is coming in Jan, no move before Feb.

 

[Leadbeard]

Heat gun or torch the nut a tiny bit, make sure you got a good vise setup and carefully try again.