Bisley Air Cylinder Adapter Spare O-Ring
S5262
This is a spare O-ring for the fill adapter on Bisley air cylinders, the charging bottles used to top up PCP pre-charged pneumatic air rifles. The O-ring is the small rubber seal that sits at the connection point, keeping the joint airtight while you charge your rifle from the cylinder. Like any seal exposed to high-pressure air, it gradually wears, nicks or perishes with repeated coupling and uncoupling, and a tired O-ring is usually the culprit when an adapter starts to hiss or bleed pressure during a fill. Carrying a replacement means you can swap it out in the field or at the bench and get back to a clean, leak-free charge without sending the whole cylinder away. Fitting is a simple job that takes a moment with no tools. Keeping a spare or two in your kit bag alongside your charging hose and probe is sensible practice for any airgun shooter who relies on a Bisley cylinder to keep their PCP topped up between sessions in the field.
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