6 replies to this topic

[Techshooter]

Writeup on Nerfmania

So, I decided I wan't an insanely awesome secondary, so I was going to make a super extended draw NiteFinder, but it evolved into this. The writeup with be divided into two parts, super extened draw and plunger tube replacement.

Super Extended Draw

Tools/Materials
Dremel
Nitefinder
Hot glue

So, first take out your plunger tube and cut off those little screw holes that hold the plunger tube down. Next, cut slots in the back of the Nitefinder in between the two screw ports and make it go up to the catch holder:







Chop off that nub on the plunger rod:



Now, you are going to want to minimize your Nitefinder:


(If you did it how I minimized it (like Rogue) then you should have most of the screw ports left.)

Set the plunger tube forward and glue it down.

Plunger Tube Replacement

Materials

1/2in. CPVC coupler
Super Glue
Goop
Electrical Tape
Lube
BBBB Pump tube and head
Hot glue
A screw
[k25] spring
3/4in. screws*3
E-putty (maybe)

Tools

Dremel
Hot glue gun
Ruler

First, you are going to want to cut your BBBB pump tube to a length of about 4 1/2 in.



Now, get your 1/2 in. CPVC coupler and cut it in half:



Now rap it several time in electical tape until it fits tight in BBBB pump tube:



Super glue it into your BBBB pump tube (make sure the coupler is all the way in). After it dries, put lubricate a piece of CPVC and put in your coupler. Put Plumber's Goop around it and the coupler and let it dry:


(This does not have the goop around it yet)

While that's drying, gut your BBBB pump head like this:



Put a screw in the hole and fill the face with hot glue:



The screw doesn't have to stay in the hot glue, it just makes the plunger head stay on better, and it adds more pre-cumpreshion and allows you to use a shorter spring.

Also, add three wraps on teflon tape or 1 wrap electrical tape under the o-ring to get a perfect seal:


(Note: In one this picture, it has teflon tape, but in another picture it has E-tape. I switched the teflon tape out for E-tape.)

Now, you are either going to want to fill in the back of you plunger rod with hot glue or E-putty. I used hot glue, but would recomend E-putty:



Now your going to want to cut your [k25] spring to a length of about 5 in.

[img]http://http://www.mediafire.com/imgbnc.php/d06e552db340db179d65e847de98c4e1f7ef7441c536ffc2b039abfac48824d94g.jpg[/img]

Here's a spring comparison. The [k25] on the right, the home depot spring in the middle, and the stock spring farthest to the right:

[img]http://http://www.mediafire.com/imgbnc.php/2617e263518fd7bf2805d611437c42c744caebe42d4f44181a1c67fd2e0a35194g.jpg[/img]

After the BBBB pump tube is finished drying, glue it in with all your internals in like this:

[img]http://i789.photobucket.com/albums/yy173/techshooter7082/100_5532.jpg?t=1302046827[/img]
(You will have to do Dremeling to make it fit)

Put it back together and your not done!

In the process of making room for the new PT, I knocked out the front swrew ports and messed up another. To fix this I added some 3/4in. screw there.

[img]http://i789.photobucket.com/albums/yy173/techshooter7082/100_5534.jpg?t=1302046919[/img]



I am incredible pleased with this blaster. It puts out a good amount of air and is pretty powerful. Shadow has already asked this question, so I figured I should answer it: the reason I am using a [k25] spring is because the [k26] had to high of a compression rate to work in this blaster.

Edited by Techshooter, 27 May 2011 - 10:22 AM.

[Draconis]

You are a little late to the party: http://nerfhaven.com...=1

Otherwise, good idea to repurpose a tube we often times simply cut off and throw away.

[Shadow the HellJumper]

Nicely done, I think this might be the first time that I've seen a pump tube being used as a plunger tube. Nice use of resources, and I liked the idea of cutting into the shell as well, even though it's a bit messy (I'm an OCD, so I naturally don't like messy too much), I like it.

Quick question, how long are the barrels for this pistol? 6 or 8 inches? Also, is there a specific reason as to why you chose a [k25] instead of the [k26]?

[SonReeceSonJensen]

good idea to repurpose a tube we often times simply cut off and throw away.

I have to agree, you could take any pump tube at make this work (though, you know, a MagStrike might be impractical). I do believe Boot did this with a ball pump, but you are the first I've seen to use a discarded stock pump setup and combine an existing plunger rod.

I will make one recomendation: hot glue will work for a while, maybe a long while, but I have had 2 extended draw NF mods with spring replacement basically shoot the PT out the front of the shell from the force of the plunger head against the end of the plunger tube when firing. I always recommend JB Weld epoxy, never had issues with strength.

[TantumBull]

I did this a couple years back to my NF, here are some pictures that give more detail to the cuts/sanding made on he shell for people trying to do this mod.

[Techshooter]

I did this a couple years back to my NF, here are some pictures that give more detail to the cuts/sanding made on he shell for people trying to do this mod.

*Supah Snip*

That's awsome Tantum, you're like my idle. What spring are you using in yours, because I belive the [k26] doesn't work, but it looks like you used the [k26]. Also, what are the ranges of yours and the barrel length. Thanks!

[TantumBull]

What spring are you using in yours, because I belive the [k26] doesn't work, but it looks like you used the [k26]. Also, what are the ranges of yours and the barrel length. Thanks!

That is a [k26], and it works great for me. Just measure everything right so that you get close to full compression when the catch engages. With a single barrel I probably get into lower 90's, but I more often use inline clips with it. The single barrel is about 8" of CPVC, which is pretty tight on my darts. Not really practical as a sidearm because of how awkward it is to holster, but fun to run around with as a small primary. Feeling like James Bond when you nerf is always something to shoot for.