Just curious… if you had one of these for quiet critter control in the yard, like a skunk, how long can they stay charged? I would guess at the high pressure they are they would leak past seals??
I'm brand new to this but it's my understanding they are suppose to be stored under pressure. I've only had mine a couple weeks but has not leaked in two weeks
They'll last until an o-ring goes bad, which should take awhile. They're best stored under pressure to keep out outside air (humidity) from causing internal rust.
Mine held out for over a year before the o-rings started leaking. I haven't replaced them yet. I've done the research now I just need to do the work. It's a doable job for most anyone who does their own minor gunsmithing. One just needs to take care when putting things back together.