Quote Originally Posted by caporider View Post
CMMG MKW in 6ARC if you want a stronger bolt. Hopefully CMMG opens the magwell back up to the original 7.62x39 size so someone can have room to make a reliable polymer mag.

I should clarify you’d need to put a 6ARC barrel on the 6.5 Grendel MKW.
Hopefully they'll do this, or will at least sell the parts so guys can piece together their own. The MkW bolt is huge, and would really let you push the envelope on handloads.

It looks like the initial CMMG 6mm ARC guns are all AR15s, and not built on thier midsized MkW receivers. I think that must be about keeping cost down and being able to sell uppers that are compatible with standard AR lowers.