
This compressor packages propellant for air rifles.

Some of those rifles are small and throw 10 grains at 575fps.

Others, slugs up to 411 grains at 800fps.
I’ve used a hand pump for my Crosman Marauder, but it cannot produce the pressure required for higher end air guns. My stopgap solution is filling a large carbon fiber tank whenever access to a compressor happens. In terms of usefulness, air guns are a lot like percussion guns, only without quite as much noise, with no smoke or soot, and without powder, cap or wad expense.