Have you always wanted to add an On/Off to your marker, but did not want to replace the entire ASA? Now you can with Trinity Paintballs Standard On/Off. This On/Off can be used with either Co2 or HPA and installs in a matter of seconds, by simply screwing it in where your tank goes. When using this product you can with the twist of the outer ring, decide whether your marker is getting air, or not, all while keeping your tank attached to your marker. In the long run this will also preserve your tanks threads, as it does not need to be constantly detached when playing.