Barrel nut question, and pinned flash hider-help

I was planning on swapping out my FF handguard, a Troy TRX, which uses a proprietary barrel nut. I’d already ordered a factory barrel nut, and a Samson Evolution.

Then, it occured to me. Since my flash hider is pinned, I can’t pull the gas block off of the barrel, which means I can’t switch out the barrel nut. Correct me if I’m wrong, but the barrel nut cannot be removed from the bore end of the barrel, can it?

Looks like I may be stuck using Troy’s TRX; have to get the extreme, if I’m thinking right. I don’t want to go through the hassle right now of having the pin taken out, and then having to replace the flash hider.

If I’m thinking wrong, please help me.

You are correct, you won’t be able to slide the barrel nut off w/o removing the pinned muzzle device.

Well, crap. It’s the details that can kick you in the junk. Guess I’ll be looking at getting the TRX Extreme instead of the Samson!