Originally Posted by
UV Halo
To be clear: the FN303's tank is unregulated- it only had an on/off, and it outputs whatever the tank was filled to. This works fine for the FN303 (even for paintball purposes) as the gun's reg drops the pressure down. Unfortunately, just not enough for paintball purposes with the valve's volume as it comes from the factory. As you may already be aware, at the valve's stock volume, the stock reg won't be able to drop 550-850 PSI down enough for safe velocities.
I personally run mine with a remote line as I like a narrower profile and I made my own plug (held in with VHB Velcro) for mounting the remote switch for my scope (Bushnell Yardage Pro).