Although I do not have any experience with them on a real gun, I do have them on all my paintball guns. I prefer the smooth one, and would like to point out that I have never had one fall off, or gum up the works. I have probably used them thousands of times through many tens of thousands of rounds and not had a problem. Funny, I had never thought about using them on a real gun. I guess my concern would be the fact that it makes it wider than the guard.