I would just email t97.ca.
No problem at all on my gen2. Replaced the factory plastic lower since day 1 and over 1000rds fired no problem at all. There is a screw in the front bottom allow you tighten it if there is any movement so it will fit for sure. To hook the trigger easier just take off the upper if you are FTU or Gen2 and press down the trigger on the hook. I also suggest buying their extended butt pad.
PM me if you wanna see some pic. I love my T97.ca LHG.



























