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Stuck buffer tube nut - What do I do now?

LzChase

By LzChase,
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LzChase

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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.

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LzChase

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1 hour ago, rocketdogbert said:

Gentle heat

You sir, are a lifesaver

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