3/4" Thinwall PVC
1" Regular (or thick) wall PVC
2x 3/4" OD 1/8" ID Metal Washers
1" OD 3/8" ID Rubber Washer
6-32 screw (not sure if that is the right size, will later be confirmed)
Epoxy or other strong adhesive
#62 spring from Ace
Drill with drill bit
Dremel or hacksaw
File, sandpaper, or dremel with proper bits
Scissors or Knife (for cutting E-tape)
Start with a stock TTG. Unscrew it. Put aside the plunger tube, stock barrel, air restrictor and all that garbage, so all you have is the shell, the trigger, and the plunger rod assembly.
Start by cutting of this part like so, on both shell halves. It should be fairly apparent where to cut, but it should be even with the green part that does not extend out.
Cut this part out also. It should be apparent. This part shrinks way down, farther in than the parts around it.
File these down so both halves are pretty even.
Dremel or file out all of the ridges in the shell that were for holding everything in place. Leave the ridges at the very front intact though.
Cut the 3/4" Thinwall PVC so it's just a bit short of fitting tightly in the shell. I think I cut mine to about 6 1/8" long. It is okay if it wiggles back and forth a little bit.
Measure the slot you cut out. Then cut a peice of 1" Regular Walled PVC just a little bit shorter than the measurement.
Once it is cut, test fit it in the slot.
Mark the PVC right at the spot where it extends out of the shell. Do it on both sides.
Cut both of the marks you made so you end up with this.
Mark the plunger tube a bit beyond the slot, and roughen up that area.
Lay the gun out with the new spring like this. Mark the spring to the point where it could fit into the gun nicely. I cut my spring to about 5 1/4" long.
Now take your drill, and drill a hole down the pre-existing one in the plunger rod. Only drill far enough that the screw goes in as far as it needs to. This hole has to fit the nex screw well.
Put the spring on the plunger rod. Now, get your new plunger head ready to assemble like this. It goes from right to left: Screw, 3/4" washer, 1" Rubber Washer, 8-32 Washer, 3/4" washer, 6-32 washer, and stock plunger head (with no O-ring).
Now put it all together. The 6-32 washer goes inside the indent on the front of the plunger head, and the 8-32 screw goes inside the rubber washer.
Close up the gun (don't need to screw it together, just close it). Pull back on the plunger rod all the way. Mark the rod where it is closest to the slot it is extending out of. It is as far up on the plunger rod that you can possibly mark.
Unscrew the screw, and take everything off the plunger rod. Dremel a slot a bit in front of the mark (no more than 1/4" farther up). Make it like so.
Now, put everything back on the plunger rod and test it.
Edited by venom213, 16 July 2009 - 08:28 PM.