The upper and barrel are bushy hardly ever fired.  I have all the tools needed and took off the barrel nut and the delta ring.  The barrel is supposed to just slide out. Well after trying for about 20 mins I gave up.  Any advise on getting this thing loose because it would not budge.

Thanks,
Ghilly

rubber mallet?

That was part of the 20 mins.

Try wiggling it? Bigger mallet?

Toss it in the freezer for an hour

I tried to move it any way it would but zero movement anywhere.  Has anyone use the freezer trick before with luck or evan had this kind of problem?

Thanks,
Ghilly

I have not tried the freezer method, but I have had several ar-15 barrels that would not come out easy. In these instances, the person who installed the barrel initially did not properly grease the barrel prior to installation. I had to heat up the barrel/reciever with a fairly low heat and then tap on the flash suppressor (with moderate force) toward the reciever with a rubber mallet. This should be sufficient to break the barrel loose. The next step is to wiggle and pull the barrel out. It can be a real test of patience.....good luck!!!!

Don't get mad at me for asking, but did you remove the bolt carrier?  Easy to forget and it'll prevent the removal of the barrel.

The bolt carrier question is key..


Beyond that, assuming you did remove the carrier and with the barrel nut off...

The spray the recevier and barrel extension area liberally with Kroil or another penetrating lubricant if you don't have or can't find Kroil.


Then try the rearward blow with the mallet, or take a section of wooden broom handle, or a large brass punch (which you probably don't have and tap it from the breech against the barrel extension, in other words use the broom handle like a punch with a mallet.

I do have the bolt assemble out ant tried to use the broom handle a little.  I will upgrade to a bigger hammer.  When I started I tried the smallest rubber mallet I had and did not want to damage anything.
Thanks,
Ghilly

Quoted: I use a wooden plunger handle as a dowel, fits perfect.   That, and a 3LB sledge.  Never had one take more than 15 whacks.

What didn't take more than 15 whacks, the receiver or the plunger handle?

Dave.

Quoted: Toss it in the freezer for an hour

NO!!!!

Metal contracts when it cools and expands when it heats.  Aluminum responds much faster than steel.  If you want the receiver to get looser in a steel barrel nut then the making it colder so that the receiver gets smaller is a good idea.  Once the nut is out of the way you want the receiver to get larger on the barrel and that means heat.  Throwing it in the freezer will make it even tighter.

1.  Clamp the thing vertically in a padded vise forward of the barrel nut.
2.  Screw the barrel nut back on then turn it back out about 2 or 3 turns.
3.  Warm the barrel nut and forward end if the upper receiver with a propane torch to about 300-350 degrees.  Not so hot as to discolor the black phosphate on the barrel nut or meltdown the aluminum upper (LOL)
4.  Release the thing from the vise and drop it down so the vise jaws catch the barrel nut just next to the OD of the barrel.
5.  Using a small funnel with a piece of rubber tubing attached, pour ice water down through the barrel to rapidly cool it.
6.  If all works well you may even hear a pop as the threaded part of the upper releases its grip on the barrel extension.
7.  Pull out the hose and give the barrel a light tap with a wood dowel and a solid hammer.  It should drop right down against the "backed-off" barrel nut.
8.  Using gloves (duh, its still hot) unscrew the barrel nut completely and the barrel should easily slid out of the upper.
9.  After you get it separated, figure out why the f**k it was seized on to begin with.  Barrels are not an interference fit into the upper receiver.

Good Luck!!!

Quoted: Quoted: Toss it in the freezer for an hour NO!!!! Metal contracts when it cools and expands when it heats.  Aluminum responds much faster than steel.  If you want the receiver to get looser in a steel barrel nut then the making it colder so that the receiver gets smaller is a good idea.  Once the nut is out of the way you want the receiver to get larger on the barrel and that means heat.  Throwing it in the freezer will make it even tighter.

That's just what I was thinking.