Maybe somebody out there has one that they've taken off? Otherwise, I think Brownells has them. In the future, I'm planning on removing the one on my 20" and replacing it with a Samson Evolution series. But that's not gonna be anytime soon. I do have a longer YHM tube that will be available for sale in the next few weeks. It's the one currently on my 6.5 Grendel. It has its own proprietary barrel nut that comes with it.
- YHM tube
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