Also the one on the pin valve is made of teflon, and side by side comparison, the oring on the pin valve and the one they sent me is a different size, but the packaging says it's the right size. Is this crucial to get this specific oring to be the same size and thickness?
That pin valve seal is actually a washer, not an o-ring. Also, I believe it is made of polyurethane, not teflon. As for using buna instead of poly, probably not a good idea. The poly o-rings are MUCH more durable when there is so much air flow at high pressures. The buna probably won't last long.
__________________ Graphite Dangerous Power REV-I
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– APE Rampage board, VS bolt, magnet trigger kit, F8 gauge, REDZ barrel kit, Halo B w/ Exalt feedgate, PMI 68/4500 Polished Aluminum and Red Dangerous Power F8
– Virtue board, VS bolt, magnet trigger kit, Halo B w/ Exalt feedgate, PMI 68/4500