+uses standard .223/5.56 BCG
+Uses standard AR .223/5.56 mags
+can probably fire standard .357 bullets
+reloaders will probably be able to convert .223 brass to .350 Legend
-Looks to headspace on the case mouth...could be dodgy
-Seems to be trying to fit a very special niche - recoils less than a .450 BM, hits harder at 200 yds than a .300BLK, penetrates further than a .243 Win at 200 yds...but no direct comparison across the board to these three rounds...
--and extrapolating from the above, it definitely does not hit as hard not penetrate as far as the .450 BM, also probably does not penetrate as far as the .300BLK due to the projectile profile, and most likely recoils more than the .300BLK as well (possibly projectile weight dependent).
Still looks interesting and could most certainly be configured as a pistol AR. Now don't get me wrong, I am not knocking it, just want to see it being independently reviewed and its capabilities tested before I start singing its praises