Anyway, on to the write-up.
First, you need to clear out your shell. You need to make room for the pump and tank.
Whip out your dremel and sand out all the little nubs and little things in the way that restrict the pump from being inserted. You will need to cut off the screw hole in this location.
Next, dremel out an area for your coupler to fit. The tank will fit fine without modification, but the coupler will have to be a bit external.
Completely cleaned out.
Now, glue in your pump body. I hot glued first, then secured it all down with epoxy putty. This was my first time using epoxy putty, and it's amazing. It worked great.
Now for the unique part, the tubing. I didn't like the idea of having loose tubing ready to snag something, so I put it all inside.
It actually doesn't interfere with the trigger catch or anything. This tubing is not the original AT2K tubing. I don't remember the size, but I got about 5 feet from Home Depot for about $2.
Next, you need to put the tank it. I hot glued it first, then used epoxy putty. You may have to adjust the hole you dremeled out before to get it all to work, but it's well worth it.
Now, tie a piece or wire/string to the firing pin. I also cut the little spring off the firing pin so it wouldn't rattle.
Drill a small hole near the trigger guard. Then feed the wire through it. When it's out, tie a keyring to it. I am temporary using a paper clip formed to a circle, but will replace it when I find a keyring.
Pictures to show it from the outside...
Ranges: No official range tests, but I did go out and shoot it a bit with walking estimations.
Crossbow- 80's. Outliers hit 90, but mostly they are hovering in the mid/low 80's.
AT2K- 60's. Mostly mid 60's. None in the 70's, but rarely in the 50's.
YouTube video (with more shots of the internals):
Edited by Coop, 26 April 2012 - 07:34 AM.