black o-rings in a 98?

[COMMANDERBOND]

wondering if standard orins are durable in a 98 using co2 or hpa?

I tested a 98 project using co2 and only got 20/30 shots before the hammer stopped blowing back.

[Toestr]

I've used buna on an HPA only 98, they work, just don't last as many cycles as urethane (but will last longer in storage). Just make sure it's 90D.

Urethane is not only used for CO2 resistance, but also abrasion resistance.

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[Trbo323]

I use buna 70d on all my tippmann builds. They work fine. Not as good on co2 but if you can add a anti siphon tube in the tank that will help

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[COMMANDERBOND]

I think i made a big mistake testing the marker with co2.

[Pumpytrilly1]

Did it start leaking?

[COMMANDERBOND]

One full power shot and a weak shot - recock repeat strong shot, weak shot, recock

[Trbo323]

Sounds like you either have a blockage or its too cold.

The only way that's the o rings is if you did something very wrong

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[punkncat]

If you are going with the black rings....

polish the inside of the power tube to a glossy finish
use HPA
grease/oil the ring on hammer