Originally Posted by
medicman816
Update: I'll wait a little while longer and see if there are any other ideas before cutting the nut off.
No need to destroy the upper.
If you have a four or five inch vise and it is securely mounted either make or buy a set of barrel clamps.
Get some help to hold the armorers wrench securely onto the nut, use the breaker bar and slide a pipe over it to add extra leverage (a cheater bar - most of the time I use an old piece of chain link top rail) pull.
If that outruns the grip of your barrel clamps line them with some appropriate sized rubber hose and try again - you can generally buy 1/2 to 1 foot of appropriately sized hose at a hardware store.
Using the barrel clamps probably runs about the same risk of shearing the index pin as do the receiver blocks but applies less stress to the receiver.
If you cant get it loose and need to cut the barrel nut take a dremel and cut about half way through the nut. Try to loosen it, the nut may split or give enough to get it off. I'd start conservative and cut a bit more each time it doesn't work, less chance of getting to the threads. Try to orient so the end of the 'scalloped' area of the wrench are on the ejection port side of the groove in the nut, not bridging the groove.
You can also cut more than one groove.
Patriotism means to stand by the country. It does not mean to stand by the President... - Theodore Roosevelt, Lincoln and Free Speech, Metropolitan Magazine, Volume 47, Number 6, May 1918.
Every Communist must grasp the truth. Political power grows out of the barrel of a gun. Our principle is that the Party commands the gun, and the gun must never be allowed to command the Party Mao Zedong, 6 November, 1938 - speech to the Communist Patry of China's sixth Central Committee
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