Hi all, I am new to this forum but interested in building a short AR upper in 6mm Whisper. I have seen a very few posts about this round and PM'd a couple of those OP's to see if they could give advise. If anyone knows who makes the barrels, etc. I would greatly appreciate some guidance. My google-fu is exhausted. I looked on SSK's website and they don't even mention 6mm Whisper in the calibers section.
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