Materials needed:
Cpvc Coupler
Some thick rubber safe grease.
glue of choice
and the trusty pliers!
So here it is, it has a rfr lever which might scare some of you. it also comes with a strap.

First  pry the orange cap in the front

Then open it up

Incase you are wondering it works like so: you cock the gun, which pulls water from the tank to the plunger tube (yes that means the plunger seal is a beast), then you pull the trigger which opens the gasket on the front of the PT and forces the water out in a unfocused blast. Its like a shotgun equivalent to a water gun.
Remove what you want, I removed the tubing, and removed the bar that opens the gasket. You should save it so you can hook it up to a at2k pin and integrate it. I did it on my other one.

The tube is about the same length as a NF tube, but wider

now grab your pliers and rip off the gasket, I was left with a small nub on the top of my PT.

also cut the area that had the tubing on it.

Fill in the hole

and glue on your coupler

The seal was amazing, but I added some silcone grease. The spring was also really strong so I didnt mess with it either.
Closed up with its brother.

Ranges with a 6 inch barrel are great, mid 80's.