What is a paintball gun air adaptor?

Answer 1

The Air Source Adapter or ASA is the part of the marker where the propellant tank is screw in, and gas is released through the opening of the tank valve. Simple ASA's simply open the pin valve by having another stationary pin or bump press against the valve pin as its screwed in. More complex ASA's allow the player to adjust the activation pin through another means, so that the tank can be screw in and out without pressure and then opened by a screw or lever motion. Most ASA's also have a "bleed out" hole for excess gas to escape when the tank is unscrewed.