I prefer these WAY more than the normal covers that go over a RIS kit. I have always liked the look of an uncovered RIS and this is perfect for adding extra grip, imo. A little pricey for $6 a strip but oh well, they're nice anyway.
I received these today, and I'm very satisfied. It's not stated in the description, but they are made of rubber and give your rail system a very good feel. helps keep a good grip on your gun.