Quote Originally Posted by JimmieDee View Post
Unfortunately you need to remove the barrel nut. There is nothing else holding the muzzle nut in place. You probably just need to "crack" it loose. Stick the gun in a vice so you then have both hands on the circlip pliers. Alternatively, you could make a tool from a hex socket. Grind / cut it to make some (maybe two) pins to fit the muzzle nut. Then you can fit a larger bar for more leverage. Good luck!
Ok,
Thanks Jimmie,

I’ll mak a decent tool, circlip pliers are too unstable.

Cheers,
Matt.