The trigger is actually a cartridge valve in a brass block. This trigger and grip assembly was from an Eclipse launcher and will be re-worked soon. At that point it will use a clippard cartridge valve minus the button. We are making a "real" trigger with a mechanical safety to actuate the cartridge valve. This will provide for a slight mechanical leverage advantage and make the launcher more "regular gun" like.
It seems that once we eliminate the front regulator, we will be able to trim the receiver to the same level as the top of the grip. huge weight savings there. Thie launcher is operational, but is going to get some needed design work. Should have some new rounds to shoot by this weekend. Looks like I might be showing it at the Internation Police Chiefs Conference in Orlando this weekend as well. Baptism by fire so to speak. or air that is...
http://www.spareairxtreme.com/specs.html
I am using this tank ($50) to mount under the magazine with a RECTUS quick disconnect. The tank is mated to a NINJA paintball SLP (super low presssure) tank regulator. 3000psi down to 275psi in one stage. This allows easy disconnect and reconnect. I have gone up to 500 psi with the quick connects and have had no problems. They are double shut off type. This will make it easy to swap out air tanks for both the mag and/or launcher.