Just picked up a Gen 5 Glock 19 MOS, installed a Holosun 507C Version2 on a C&H precision plate. I used screws from Big Tex to mount the plate to the gun and C&H screws for optic to plate. (I used blue loctite 243 and the torque settings on wheeler fat wrench from a previous thread). Now to zero it this weekend, my plan is to make it my primary training/match gun. Crosses fingers all will go well.