I'm wondering if my reduced & revolving piston HW80 is an O ring, not had a chance to strip it as there has always been something else in bits. I bet it's the work of someone on this forum. It's running just over 9 ft/lbs & I'd like to up that a tad for long range shooting. I'm thinking it's more likely to be seal wear than the spring.
I've got all the O rings for the 100, the missing ring was how it was when I got it. I was watching a strip & rebuild you tube when I spotted the ring on the youtubers valve which isn't there on mine.
The parts & respective rings are all laid out now ready to be fitted.
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