Need Help With Taking Off Outer Barrell
 

Now, I know that you unscrew the little screw at the end of your trigger assembly area, and you begin to unscrew your outerbarrell.
It should be easy, right?
Wrong!
I can only get a half rotation before it the barrel just cramps up and I can't even muscle out another mm of rotation.
Somebody help, what's going on?

PS: I might sound like an idiot, but maybe I'm twisting the wrong way? Very unlikely, because I'm twisting it left.

It's a Well MB03.
The screw's location is kind of hard to explain when you don't know the names of many parts of the assembly.

I've got the Well MB03, actually two of them. The first one I got was really easy to screw on after applying some gun silicone oil to the threads. But my second one was very difficult. I had to get my dad to hold one pipe wrench on the outer barrel while I held another on the trigger assembly. It was tough work. I feel like I messed up the threads a bunch.

If you can, try not to use this method putting it back on. Once you're ready to put it back on, try cleaning out the threads as much as possible and perhaps some oil.