So heres your typical NB-1.
Ranges are very inconsisteant due to the fact that the faster you pump it the further it will go. With my 13 year old arms I could only squeeze about twenty feet out of it.
To start your going to need to open the gun up by dremel. I would reccomend using the thinnest cutting wheel you can find as it will make for less work later.
Once you get it opened you will find this.
Pretty self explanitory just a pump minus a check valve, the arrow barrel, and some exposed tubing. So after I saw what the inners looked like I went diving into my parts bin and found this.
Yes an airtech 3000 plunger tube. So trying too keep it as clean as possible I intended to make the original pump of the NB-1 fit into the 3k pump. Upon removal of the pump of the NB-1 I met my worst nitemare.
Not only is it terrible it couldnt fit into the pump=( I removed the plunger head and it still wouldnt fit because of a ring of plastic that lies under the original plunger head. Once that is dremeled down test it out and make sure it can move freely in the 3k plunger tube. After all of that I went and found some mysterious o-ring in which I dont know the size and/or gun it came off of and slapped it on and added a nitfinder like o-ring to stabilize the mysterious one. Then your going to want to shave down the 3K plunger tube to make it fit in the shell. Finished plunger head should look like this. (Also please don't lube it because it will only make the seal greater and will make pumping it harder.)
So now the plunger assemply is done now your going to make room for the tubing in the shell. There are screw-port-like structures the restrict tubing room. I got rid of with some snips
Thats better, now we have room for our tubing! So go get some 1/4 inch OD clear vynal tubing and connect the original orange tubing from the 3k pump and the new clear vynal tubing with a connector. This seems really easy, but it's not. Your going to need to minimize the connector dramaticly! I cut off a couple of the barbs off because when I used the stock connector there wouldnt be enough space and it would crimp the tubing a lot making it harder to pump. So I grabbed my trusty dremel and went at it and was left with this
Tiny aint it?(haha) With the mini connector you will have enough room to keep the tubing in the shell and improve its cleanlieness. Also please add some goop over the connector and the two tubes to improve the life of your NB-2000 because when your rerouting the tubing it will have a tendancy to slip out. To rerout the tubing I just ran a loop through the handel and under the 3k pump out of the hole where the end of the original pump was. Please leave enough tubing to connect to the air tank too.
Overall internals should look like this
This is where the most frustrating part of the mod is;closing it up. Now the NB-1 is what I call a "glue gun" due to the fact that the two sides of the shells are glued together. To keep the shells together I used some 1 minute epoxy because I'm very impatient. Also i would reccomend using a vise to hold the two halves of the shells together, but I dont own one so I was a man and as angel would say "used my hands". Once that is done your NB-2000 is almost finished except for the following:
An air tank and a paint job.
So the tank part is simple just grab your favorite air tech series tank(I chose the 2k) and connect it to the tubing coming out of the hole in the back where the tubing from the pump should be located. I would reccoment using goop for this one too. Then grab around 8 inches of your favorite barrel material (I used PETG) and slap it onto the mouth of the tank, add some goop, and your ready to go. Then glue the tank on. The final step in making your NB-2000 is giving it a trigger, but I couldn't find anything so I used a PVC ring After that's done, whammm an NB-2000 is born.
One last thing: I wouldn't reccoment going over 6 pumps with this because of the risk of an extreme case of Tankexplodinginyourfaceidous; a very agressive disease effecting most nerfers with external tanks.
PS: Very sorry for the blurry pics because my camera likes to swim in other people's pools.
Edited by CoasterDynamix757, 30 April 2009 - 08:27 PM.