I have a Bushmaster carbine with the welded on flash suppressor and am trying to remove the barrel to install a free float railed hand gaurd but the barrel nut appears to be stuck. I am using Bushmaster's Barrel Vise Jaw Blocks to hold the barrel and Armorer's Barrel Wrench but the barrel spins in the barrel vise when I try to remove the nut. It is as if the nut is welded on. If I tighten the vise on the barrel any tighter I am afraid I will start to crush the barrel. I have already broken one vise tightening it down on the barrel. What the hell am I doing wrong am I missing something?
Please no BS about the Bushmaster or I should have bought a better AR, or whatever. It is what I have and what I am working on. Any help with getting this freaking nut loose would be greatly appreciated. Thanks.