u/Affectionate-Hat5398

I want to buy a marker from a German online store, however, I don't live in Germany and hence am not legally bounded by their (very strict) regulations. Is it easy for a normal guy to "tune" the marker to normal muzzle energies or do you need special tools or so to pull that off?

Also, kind of unrelated, but still: Does anyone know if this regulator works with a Tippmann TMC airstock? It looks a bit more chunky than a "normal" one so I assume it's not meant for airstocks but it's like half the price so it'd be nice if it was.