WTB 6x45 or 300 Whisper/Fireball barrel

Anyone got one laying around they are not using and would like to see money for it?

Thanks for all the looks.....I'm buying a new upper tomorrow. I guess these aren't popular or people who have them won't get rid of them.

It kinda blows my mind about the lack of interest in the 6x45 though. Standard mags work, standard .223 brass, just necked up to 6mm and you get 30% more energy down range.

Everyone I've talked to about it that has one loves them.

I decided against the 300 Whisper because brass is harder to form and there are reliability issues, so you have to tune the gas system to each load; sonic vs. sub-sonic.

Frankly I'm surprised the 6x45 isn't more popular either.

Mike