
It will work, but watch out for runaways with weak ammo.It's a good thing the SS is 3 position. The AR trigger is better than any open bolt trigger I've tried and HK guns.
I put 2K through my Versa 12 this week. It felt good to use the 20+ Suomi stick mags I bought for Richards DF Max upper and the BRP U9 I had for a while.
Back to the G18 mags and lower. I'd to experiment with a spare the Max-31K main spring unless Richard thinks that's a bad idea. It fits without over compressing the spring and seems to have a bit more force at the bolt closed position.
I was watching my video again and it was failing even on a locked back bolt and first shot, which tends to agree that the bolt can't overcome the force of stripping a round out of the magazine.I was reading this morning that Scorpion mags have a history of failing to feed in Scorpion SMGs and CZ recommends down loading about 5 rounds in the mag.

So funny. I repeated this about 3X today to my wife and son who were having a blast shooting the 9" AR22 SS. I am worried that I made the same mistake while testing the Versa 12 Scorpion module. I should order another to make sure.Make sure after inserting the magazine that you tug down on it, otherwise the bolt can hit the top of the magazine feed lip and jam.