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Things I liked: Had no issue installing this item, since I rebuild and replace the O-rings in all (600) of my airguns over the last 30 years. I added a regulator to all 6 of my airarms 410/510 air rifles and just wanted a extra cylinder in case I sell one to someone who does not want a regulator.
Things I would have changed: No changes.
What others should know: I would send it to pyramyd air for replacement to be on the safe side