You could register your Glock as an SBR for these
I had the opportunity to look at the RONI clamshell set up and it was a well made item. The guy selling them had them housing some Glock G18's which was cool. Then he told me the price of $650.00 and I almost fell down. I was thinking more in the ballpark of $300-400.
I have a MechTech set up for my Glock G22 and I've been very pleased. It's a blast to shoot and it's very accurate.