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At3k Pump Extension

Woot! first mod

9 replies to this topic

#1 veginator

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Posted 25 November 2008 - 09:46 PM

Anyway, as for the 3K, flow-rate isn't the limiting factor. It's pressure (and I think the seal, but I'm not sure). The design of the pump makes it more difficult to get as much pressure built up compared to an AT2K or other pump guns that have an exruting pump (instead of a sliding pump, like on the AT3K, AT4K, and SM3K).

The purpose of this mod was to make slide pump guns such as the at3k easier to pump when they are plugged. I think it turned out well.
Posted Image
Materials needed:
6-7 inches of 1/2inch OD aluminum pipe
3 in of 1/2 cpvc
1/2 cpvc endcap
at3k or similar slide pump gun

Tools needed:
1/2 inch drill bit
drill
glue of choice
dremmel of round file

Posted Image
First locate the pump and take it out.
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Now drill through the hole shown with the 1/2 inch drill bit
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Once you have done that jam your aluminium into the hole you drilled.
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Now to make room for the aluminum you need to cut this piece out of both sides of the shell.
Posted Image
You are also going to have to close up the shell and take your drill and make another half inch hole.You are also going to have to file it down so it doesn't rub.
Posted Image
Next you need to cut the aluminum to size and drill out your cpvc to fit over the aluminium and glue it on there.
Posted Image
Finally slap on the end cap and put on some barrells if you haven't already.

It is now much easier to pump up the gunto high pressures because of such a smaller amout of friction on the new pump handle.

Questions/Comments/Flames?

Edited by veginator, 26 November 2008 - 07:06 PM.

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#2 cheesypiza001

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Posted 25 November 2008 - 09:52 PM

Interesting. You also might want to fix some of your spelling and grammar.

EDIT: Sorry, that was rude. Anyway, your gun looks great! You may want to slap a paint job on there.

Edited by cheesypiza001, 25 April 2009 - 09:44 PM.

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#3 TantumBull

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Posted 25 November 2008 - 10:06 PM

Shut up, CP.

Good first post, veginator. I believe its been done but that doesn't mean a good, informative write up isn't necessary.
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#4 nerfer9

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Posted 25 November 2008 - 10:09 PM

IT NEEDS BIGGER PICTURES!!!! I couldn't really see, so I just read it. Easy to understand
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#5 NerfMonkey

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Posted 25 November 2008 - 11:48 PM

IT NEEDS BIGGER PICTURES!!!! I couldn't really see, so I just read it. Easy to understand


They are magic pictures: click them and they get bigger.

Nice idea Vaginator.
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SexD Warves

#6 123caviler

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Posted 26 November 2008 - 11:33 AM

Sorry to burst your bubble, but this has already been done here. I think that this is a great idea though.
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QUOTE(One Man Clan @ Mar 15 2009, 03:49 PM) View Post

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Mr.Kool_Aid,
Your member account at NerfHaven has been temporarily suspended. blah blah blah

OMC is fucking god.

#7 veginator

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Posted 26 November 2008 - 01:40 PM

And I thought it was my first actually oringinal mod. I guess I should have searched better then. :(

Edited by veginator, 26 November 2008 - 01:41 PM.

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#8 Draconis

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Posted 26 November 2008 - 01:41 PM

Good idea! I've done the version where you extend the track as much as possible and remove the front screw post from the handle. It works really nicely. I like this version better, though. I guess I know what I'm doing to the other two I have... :(
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#9 veginator

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Posted 26 November 2008 - 07:04 PM

Good idea! I've done the version where you extend the track as much as possible and remove the front screw post from the handle. It works really nicely. I like this version better, though. I guess I know what I'm doing to the other two I have... :)

I'm glad you like it. :) I think you will find it much easier to put in a lot more pressure. With the slide I practically had to brace the gun on my chest to put in 8 pumps but now I can easily put in 10(not recommended).
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#10 Ubermensch

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Posted 26 November 2008 - 08:14 PM

IT NEEDS BIGGER PICTURES!!!! I couldn't really see, so I just read it. Easy to understand


They are magic pictures: click them and they get bigger.

Nice idea Vaginator.


Did nobody notice that he said Vaginator?!
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