The New Mini Direct Mount On/Off ASA has all of the features of the Direct Mount ASA in a new Smaller and Lighter Package. This ASA use's what we call "System Bleed" and "Virtual Resistance" Due to the fact that it has virtually no resistance at all while turning it on or off. Simple to turn then snug it down with the last 1/4 turn to make sure that it stays on during play. System Bleed will bleed all the air from your tank lines allowing you to easily remove your tank after degas. This item mounts directly onto your paintball marker. There is no need for a drop forward or rail.