O Ring material?

[Wolfer]

Best o ring material for P17 Beemans. Also best lubes for given material.    Mike

[fireslinger]

From what I've read on different forums, ptfe seals are the best. But they are very expensive and hard to find. I just use these seals from Lowes and they work pretty well. The lube for the breech seal comes from alchemy and I've used it for 2 years now with no issue. White lithium for the piston and the seal in the piston has not needed to be changed yet. I'll probably take the seal off in the future and take it to Lowes or home depot to find some spares.

[Motorhead]

Buna/n 70 duro works just fine.  keep lubed