Things needed
-superglue
-electrictape
-PVC cutters or a hacksaw but PVC cutters are recomended
First disassemble your AT2K then take the airtank out and draw a line in permanent marker on the tank. Now this is where you can diviate from my plans alittle. First you take your PVC cutters and slowly makecircles around the outsde slowly decreasing its size. Until it comes apart in two pieces. If you do not have PVC cutters then you can take a hacksaw and cut through the outside but be sure to not cut through the middle part where the metal pin is. When you are done with this step it should look like this

Take off the black o-ring part that is off in the picture above. The take super glue and glue this black piece back onto the plastic piece it was on.

Next take some electric tape and pull back on the metal pin and put the electric tape on it so the pin will not move forward. It should look like this

Now using superglue again attatch the two pieces of airtank together this is where the permanent marker marks help to line up the tank. it should look like this

This is the second upgrade that can be done to inprove the gun. The orange gauge part of the assembly is also a weak point in the gun. In two of my guns it has leaked or entirely broken. To fix this is rather simple.
materials needed
-superglue
-hacksaw
-drill with drillbits
-new tubing
-knife
First remove the orange part from both the airtank and the yellow tubing. Also using a knife remove the yellow tubing from the pump. Using a drill, drill out the hole where the orange part was in the airtank. it should be large enough to accomidate the tubing you will be inserting i n there. When this is done it should look like this

Next cut the tubbing like this to make it stay in the airtank easier.

Cut the tube to lenghth where as it fits over the pump part where the old tubbing was. Glue the other end of new tubbing onto that part with superglue add Electric tape. It should look like this

Finished it should look like this

To finish this you must do a bic pen mod to do this add a bit of bic pen onto the pin as seen on the last picture. To get more info on this part use the searchhe website. Now add a new barrel and put it back into the case and you have a gun that will be able to be pumped to a much higher amount and without harmful repercussions.
Any questions or comments?
-DTReaper