Removing barrel stub from milled receiver?

[Akkid]

Any tips on removing a threaded barrel from a milled receiver. I let it soak in breakfree, torqued it down in a B.A.V., used a pipe wrench and 4 foot cheater bar w/ no affect. What about takeing a torch to heat it up? If that doesnt work Im going to try and drill the old barrel out to the point that most of the metal is gone, should come easy then. Any tips appreciated.

[Rule .308]

Silly question but do you know in fact that it is screwed in to the trunion and not pressed in like a stamped receiver trunion and barrel assembly would be?

[Blicerode]

Silly question but do you know in fact that it is screwed in to the trunion and not pressed in like a stamped receiver trunion and barrel assembly would be?

Good point. Check and see if there's a cross pin somewhere.Some pins are in pretty tight and if you don't have a press, you might be able to drill out the pin. If it IS threaded ,a dremmel with a cutoff wheel and a cold chisel will knock it right off.I dremmel at angle front to back so as not to grind too deeply into the barrel flange. .

[Rule .308]

I think he is trying to save the receiver and destroy the barrel not the other way around :small_gri

[footlongcuban]

Try the FAL approach. Cut the side of the receiver stub with a dremel cut-off wheel and then split with a chisel. Cut in the thinnist part of the stub, through the scallop cut, being careful not to go too deep and damage the threads. As soon as you see the color change stop and try splitting with a chisel. I hammer them on the cement floor of the garage as the floor makes a real good backer. Once the stub splits it should unscrew with relative ease.

Of course make SURE its not a pressed and pinned receiver BEFORE doing this.

[Akkid]

Rule.308, wins a prize. Got the basics down boys, no newb here; it is threaded and that sucker is damn tight. Think the only way this thing is coming out is to drill it. Maybe I can get time this weekend to do it.

[Rule .308]

'Bout time I won something :D . Well, seeing as how the barrel probably gets at least 150-200 degrees minimum when you are smokin' thirty rounders through it I would try a little heat on it. Emphasis on a little. My concern would be in heating it up enough to anneal the lug areas of the trunion where the bolt locks in. Passed that I would consider soaking it overnight in some good penetrating oil like Kroil or you can see what the local plumbing shop might have. I don't recall the name off the top of my head but my local shop had this stuff that was designed to eat through, rust and ancient pipe dope like nothing. Another one you could try is JB Blaster. I have not personally tried the stuff but some of the guys online have sworn by this stuff as THE stuff to have. It's supposed to be available at most of your local autoparts chain stores. The problem that I forsee with drilling the barrel out until it is real thin is that in order to do that you would end up removing most if not all of the material that you would use to spin the barrel out with. You may want to consider relieving the barrel shoulder which is the bearing surface that it torques down against. You have to think about what is holding the barrel in, mechanical force i.e. it is screwed in damn tight, resistance i.e. gunk cooked into the threads, or most likely a combination of the above. I would try a good impact on it. I am a mechanic by trade so I have run into my fair share of busted and frozen fasteners. It is amazing how many things you can get to unscrew if you smack them (impact) sharply a couple of times. On the other hand I have seen people slowly twist bolt heads right off by turning it harder and harder instead of giving it a good sharp smack with a hammer.

All that being said, if it were mine to do I would 1) relieve the shoulder in a lathe if I had one 2) soak it in Kroil or another super duper penetrating oil overnight 3) chuck it in a padded vice and heat it up some with the propane 4) put a pipe wrench on it as close to the receiver as I could get 5) smack that pipe wrench 4-5 times with at least a 32OZ. ball pein if not a small sledge hammer.

[droog]

I bought a threaded Hungarian barrel and had to heat the trunion with a mapp torch then screwed it out with a small pipe wrench.