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Old 12-18-2012, 01:35 AM   #1 (permalink)
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Buna Orings...

Quality the same as typical silicon orings or what?

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Old 12-18-2012, 03:43 AM   #2 (permalink)
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Very few silicone o-rings are used in paintball. Most of the clear colored ones you see are polyurethane. Buna works ok for most paintball applications. The main reason they're popular is the price. You can buy 10 buna o-rings for the price of one urethane one.h

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Old 12-19-2012, 07:10 PM   #3 (permalink)
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Different guns and accessories that use o-rings have them for different purposes. Your best bet is to match the material that was originally used, because the differences are more than just price. There's the rate of compression, the hardness factor (durability), chemical/oil resistance, etc. All of these factors determine the best o-ring material for the particular job and sealing requirements, and chances are the factory that applied the original o-rings have taken that into account when they put the stock o-rings in place.

Generally speaking, buna-N o-rings are going to compress more than urethane, and may as a result seal better than urethane, but they have very poor abrasion resistance. They don't last nearly as long when used on moving parts.
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