Mr. Wolverine, I am interested in the design of the bolt face. Will it have more "meat" than the AR-15 bolts in 7.62x39, and hopefully avoid those weakness issues?
What is the depth of the bolt face recess, is it .125 or the .136"?
If one could get their hands on one of these with a good strong .136 bolt, it should feed the straight walled 6.5 grendel reliably in the original WK-180C lower, using 10 round AR mags. That would be some fun tinkering around and a sweet shooting rifle for us Nutz!
I see why you are going with AK mags lower for 7.62x39, that tapered case needs the curved magwell.