Righty tighty, lefty loosy. You can't really unscrew the barrel as there are no threads keeping it in place on the barrel extension. The only thing preventing it from rotating left/right is an index pin on the barrel extension. The barrel nut keeps it locked into place.
Using a vise without a barrel clamp can lead to some ugly markings if you manage to get the muzzle device off.
Malice pointed out a couple great tools to aid in removing the device and avoid warping your receiver if it is unsupported if excess force is required.
Sorry, I have to correct you on that......
Normally, the barrel extension is torqued onto the barrel at 150 ft/lbs, then the index pin is inserted. Some people set the index pin into the threads, but it's sole purpose is to index, not lock the extension to the barrel The barrel nut then holds the barrel extension into the receiver.
If your barrel was not torqued to the extension properly at the factory, it's possible to unscrew the barrel completely from the extension and leave the extension and the barrel nut attached to the receiver.
I tried searching for retailers here for those. Anybody in Canada have those or am I going to have to order from the states?



























