I bought a four stage hand pump and like to use it to bring my PCP guns back up to my tuned max. It works fast on the Diana Bandit and Marauder pistols. Takes longer on rifles but it is easier to have in the truck than the bottle. It is cheaper than buying a filled tank to be able to hand pump on your own time. Check out the better ones with the moisture absorber. It takes some effort. Works well. Be Well, RZ.

Socialism is a philosophy of failure, the creed of ignorance, and the gospel of envy. Its inherent virtue is the equal sharing of misery. Winston Churchill.