I bought these to use on the side rails of my SIG 556. I like them a lot but they do not work with my Crimson Trace MVF515 grip installed. I took it off to install these covers on but then the grip would not go back on because the grip was installed. I had to remove the covers and not use them. I will need to send them back and see if there is a different cover that will work. I have to say they did look nice and were comfortable to hold onto when I did have them on.
They were a little tough to snap into place but they were snug when on. I thought about cutting part of the side away around the mount for the Crimson Trace. That will be a last resort if nothing else fits.
Pros: Comfortable
Cons: Tough to install
This review was written in the old system and had content requirements that are different than reviews written today.