make sure you can find one adapter for your gun in that link
if you don't know how choose
show me your gun and cup i will give you suggest
spray gun adapter
Will fit different spray guns
PPS adapter converts typical spray guns into ones that work with the Paint Preparation System
Specifically designed adapters, allows painters to use the PPS with virtually any spray gun
Threaded adapter is easy to install
Nice and clean condition
This product is intended for use in place of metal cups on most gravity cup guns. Setting up thegravitycup vs. standard PPS is connecting thegravityhose from the cup port , or spray gun regulator.