Does it have grooves in it?
The YHM wrench would probably work.
The YHM wrench would probably work.

No groves at all, just knurled and it was on tight ! No loctite either.Does it have grooves in it?
The YHM wrench would probably work.
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They must use some sort of strap wrench on them and loctite.No groves at all, just knurled and it was on tight ! No loctite either.
Thanks, Joe
I could see them using some sort of strap wrench, but I can assure you, they did not use any loctite. I'll take a couple pictures when I have some time.They must use some sort of strap wrench on them and loctite.
the handguard is just an aluminum tube that has threads on the barrel nut end. No holes or anything. It goes on the same as the Yankee Hill Machine handguards, but the jam nut doesn't have notches on it, just the knurling. No screws at 3 and 9 o'clock either. If you look at the picture, it's of the Yankee Hill set up. you can see the jam nut threaded all the way to the end of the barrel nut. It has grooves on it and would work perfect with the wrench that semi-cop suggested, but the R15 jam nut is knurled. Like semi-cop said, they must use a strap wrench of some sort but it has to be thin, because the Remington nut is thinner than the one pictured.If you remove the handguard first does it have holes in the face for a standard barrel nut wrench?
I will when I get home in a couple days, working out of town now.Can you post a close up of the barrel nut?