Uploaded August 2020 | Updated September 2026, 2 weeks ago
It is not just O-Rings. The chamber seal is vital but misunderstood. Even experts on airguns, like the HW R-1, may not understand the mechanics of the 880 chamber seal.
IF YOUR PUMP HANDLE FIGHTS YOU, you need to look at your chamber seal for oil build up or wear. If cleaning off the edges, and checking the inside recess, does not do it, replacement is cheap and easy.
It is not just O-Rings. The chamber seal is vital but misunderstood. Even experts on airguns, like the HW R-1, may not understand the mechanics of the 880 chamber seal.
IF YOUR PUMP HANDLE FIGHTS YOU, you need to look at your chamber seal for oil build up or wear. If cleaning off the edges, and checking the inside recess, does not do it, replacement is cheap and easy.
