Whats the difference between urethane, silicone, viton and buna o-rings?
The differences between these materials have a lot to do with what chemicals and temperatures they can tolerate, but they also have a lot to do with personal preference as well. Some people prefer silicone because they say that it withstands more abuse, and some people say buna does. From our experience, Buna is by far the way to go with paintball. It is good in a wide array of temperatures, can last a long time, seals great, and is nice and inexpensive.