Honestly, in the 4 years i've been playing, and mind you I don't go out all the time (once or twice a month), I have not had to change one o-ring in my RT since using KC Trouble Free. I would use goldcup before and my bolt o-ring would always wear out but that just doesn't happen anymore.
Conclusion:
It is a good feeling knowing that I don't have to change my o-rings or even carry spare o-rings for my mag because I use this product.
