I tested 2.0 Sunday. I was able to shave off almost 900 RPM from the 1850 RPM. The new ROF is about 1000 RPM.
Max 11A1:15 22LR Kit 2.0 | strobro32 | Flickr
Here the screw on barrel adapter for the 15-22 4.5" barrel to AR upper.
We also made a custom clip to use 15-22 mags for the Max-11A1 magwell.