First remove the ammo holder and priming handle. If you can't just rip off the handle use the back of a hammer. Then take out the screws.

What you should see now:

Now pull out the plunger rod, and carefully Zap-A-Gap some foam into the plunger head seal(I used part of the back of a BBB arrow). This expands it increasing the seal. Then lube it.

After that pull out this metal pin in the plunger tube.

Then widen the airflow. I don't remember the exact size drill bit I used but make sure the hole is no larger then the I.D. of cpvc.

Now put the pin back in and Zap-A-Gap the little holes. This makes it airtight.
I found that wrapping E-tape around the hole in the barrel still let air escape. So instead I lubed up a piece of cpvc, put it in the barrel pushing up against the hole, and put hot glue on the hole. This made sure no air leaked their anymore.
A short video showing what I am talking about:

For the barrel I wrapped about 1.5 layers of duct tape around some cpvc. I found that this made it perfectly tight in the stock barrel to be used like a coupler. It is suprisingly airtight. The E-tape is just for a better grip. You could make it a speedloader if you wanted to.

Now all you have to do is put it back together and your done!

Range test vid:

There was no wind and ranges were taken with slug darts and were shot flat. They were shot into grass so there was no dart skip.
Results: 58' flat, 62'flat
Conclusion:
Overall I am fairly pleased with the end product. 60 feet flat is pretty decent for an Eagle Eye. Especially considering that I didn't add any springs, and how easy this was to do. It is still too big to be a sidearm so there isn't much use for it, but it was just a nice fun side project.








