The double trigger kit is a drop-in kit that replaces the single trigger and trigger guard. The kit includes a double trigger and a tournament legal trigger guard. To install the double trigger simply remove all gas sources and disassemble the marker to the point of removing the left half of the markers receiver. Remove the single trigger and guard. Then replace with the double trigger and guard. Now replace the receiver half. It's that simple!!!!!!!
The Tippmann Double Trigger is newer, so it should be commonly available, both new and used.
trigger works great, and is a breeze to install. yes, you have to cut a little bit of rubber off of the grips, but that only takes five minutes and the end result is well worth the effort. the design also makes the trigger work with the drop-in response trigger kit from tippmann.
i haven't had any problems at all with mine.
i think it's a great product for the custom 98. the small amount of cutting you have to do on the grip is well worth having a nice double trigger. it performs well, works with all of tippmann's other drop-in kits, and isn't very expensive.