I've got one from Rock River on backorder and will post a review when they start shipping again and I go to the range. The one from Rock River has a lower that will only fit AK mags but I think the uppers are interchangeable. I previously had one that used the AR type mags but it was 50/50 on shootability so I traded it.
A Colt Python's trigger pull is as smooth, beautiful and artistic as a Sidewinder sliding on the desert floor. It is concepts like this that the anti-gunners can never comprehend and why we fight so hard to keep them.
NRA Benefactor Life member