It cost a lot, about 50 euros, but it's the best shock pump I have ever seen.
The pressure gauge shows a max pressure of 500 psi, but it has a max pressure of 600 psi
It takes time to charge, but completely acceptable. To charge my sniper gun up to 200 psi only takes 30 segs
The best thing about it is that it has a special connection to the schraeder, no air loss during disengage







