So my fx impact mk2 is leaking from the bottle adapter. I took it off to inspect and the rubber steel washer, part of the rubber is coming loose from the steel ring. I think this causing the leak. So I look on fx part list and it's called the rubber steel washer m12. So I google that and found some. But there size are completely different. Idk what fx use as a measurement but if they called it the m12 washer, shouldnt it match all other m12 washer? Or fx use their own measurement. Anyone know where I can find this rubber steel washer? I know I could probably get it from utahairgun but I don't want to pay the $8-10 shipping for a stupid o ring. If anyone know where I can get it cheaper with free shipping or shipping like $3-4, could you post link pls. Thanks