The frame mount is very easy to install. However, it is required to mill down the ejection port to give the spent casings room to be ejected. I also installed a 40 cal ejector, so the spent casings would eject out the side rather than up. (9mm gun) Installing the 90 degree sight mount would have the benefit in that no slide work would be needed, and the sight would be lower. The down side to the 90 degree sight mount would be having to drill a hole in the frame.
I thought all the frame mounts needed to be drilled into frame? Correct me here or enlighten me lol
Not all frame mounts are drilled in to the frame. This one replaces the trigger pin like the SJC & Carver. Fits in my holster without modifying it.