Cosmetics are a very important thing to me in nerf guns, so I always look to keep a very clean look with all my mods, so after some thinking I found the perfect way to integrate a 2k into/onto a pump shotgun.
Things you need-
- pump shotgun
- airtech 2000 internals
- a dremel
- your favorite type of adhesive
- 3/8" tubing (I'm not 100% sure, because I did this mod a while ago)
- hot glue
- a metal pin
- plexiglass
First off, I did Angels level 2 shotgun mod, except for adding a spring to the trigger which I did differently to make space for the tubing. Angels mod can be found here.
We are primarily going to be working on the stock of the gun, so I don't have any pictures of the front in this write up.
First you are going to need to make a "cross" cut in the back of the stock.

Next, you are going to need to make the hot glue in the handle sort of like angel did, except for where I positioned my tank, we need space in the back, So you are going to have to glue a metal pin to support the spring and still be able to have space in the back. I hot glued the pin a little, let it cool, then used some zap-a-gap and then repeated the process a few times. DO NOT ADD HOT GLUE ONTO WET ZAP-A-GAP, IT WILL CREATE TERRIBLE FUMES, I got some of the fumes in my eye once, and I had a sharp buring pain for about five minutes.
(This pic isn't too great.)

Next, you want to cut off the end of the pump handle at a slight angle, and replace it with some plexiglass. (or you can skip this step if cosmetics don't mean as much to you.)



Next you are going to need to pick a spot for the tank, I chose on top of the gun for reasons I can't explain, I just bought another pump shotgun and I'm going to put it on the bottom where firing it would be much more comfortable. I initially glued it with zap-a-gap and the used epoxy putty for support.



Now you need to make a hole in the shell of the gun for the tubing to pass from the pump to the air tank.

Now you can put in the pump and put the tubing through the hole.

Next connect the tubing to the air tank.


Now you have a 2k as a back up shot for the pump shotgun that is very cleanly done, the pump is not sticking out in weird places that make it look very "fugly".
Sadly, this gun is still unfinished due to the fact that I cannot for the life of me find any neon blue paint anywhere, but all other components are finished and have been tested.
Here's some more pics for the heck of it.




