Stuck buffer tube nut - What do I do now?

[LzChase]

I've started a VFC HK416A5 Gen 2 build, and so far everything has been going pretty well. The only issue seemed to be that disassembly is a bit difficult since the fit is so snug that I had to tap the stock multiple times for the upper receiver to release from the lower. This in turn is a possible reason for a real problem that has made itself clear.

 

The castle nut is completely stuck. It won't budge at all, it's like trying to undo a bolt welded into place. Is it staked somewhere (and then how do I get it off?), am I doing something wrong? is the thread CW or CCW? or is there a pin somewhere? I'm half expecting the armorer wrench to break before the nut loosens. GBBR-type version.

Edited July 30, 2022 by LzChase

[Guest]

Gentle heat

[LzChase]

1 hour ago, rocketdogbert said:

Gentle heat

You sir, are a lifesaver

[Guest]

I use a gas blow torch VERY carefully lol