habe you seen a barrel nut like this? I haven't, great design, love that you only have to index the handgaurd and not the gas-tube like all the other free-floats I have done. also it uses an actual wrench rather than those little two pronged deals that every other free float nut has used in my past. but danged if I cannot get it off.....am I missing something? I have looked and looked for a set screw or anything that would make it so freaking tight. it's brand new, just assembled and arrived today, couldn't imagine a factory would loc-tite or anything like that, but even so, the weight I putting on this screw would break loc-tite I would think. suggestions please. sitting with penetrating right now, don't want to break out the torch and damage the finish on the upper