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Posted: 3/13/2002 10:14:01 PM EDT
How hard is it to do?

I watched my armorer's video and it seems easy enough.

Is it easy?
Link Posted: 3/13/2002 10:54:00 PM EDT
Remove handguards.
Remove gas tube.
Unscrew barrel from extension (torque wrench).
Screw new barrel into extension (torque wrench).

Obviously you'll want to use an armorer's wrench, or whatever, but I believe a torque wrench would take care of the job just fine in case you didn't have one. Just dont scratch that new barrel of yours.
Link Posted: 3/14/2002 3:50:59 AM EDT

Unscrew barrel from extension (torque wrench).

No, a torque wrench is only used for installing a barrel, not removing. Use a breaker bar or ratchet for that.
Link Posted: 3/15/2002 4:14:44 PM EDT

I would get the good BARREL NUT WRENCH and loosen the barrel nut. then then barrel and barrel extension should come with out of the upper. I would replace the barrel with the extension all ready installed. This is the critical part and where the head spacing is set. Put some lube an the threads and re-tighten the barrel nut. 35ft.lbs and then to the next hole that lines up with the gas tube hole. A good idea is to torque to 35 ft.lbs., then loosen, repeat 2 more times, then do it the last time.

Armalite sells the good wrench. You should have the receiver block set too.
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