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Bbb Cpvc Mod


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#1 pwnchu

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Posted 16 October 2007 - 06:10 PM

This is a way to single a big bad bow/ 3b/ bbb. They're not as good as the angel bbb or many of the other ones but i figure people might want to know about it. The plunger etaping may come in handy even if you would like to use better barrel materials.


-do the whole AR drilling as everyone else does (take out the front piece and spring, then drill a hole through the center of the back AR).

-cpvc barrel: cut most of the orange barrel off (not all, because you can force cpvc through it, and the tight fit stabilizes the new barrel). Then shove some cpvc down it from the outside end until the barrel touches the AR that you drilled. I kept my barrel short (3") because i'm using stock darts (gasp) and no nesting (gasp again).


picture taken from the vastly superior abbb mod writeup.

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leave some of the cylindrical barrel part, don't cut it all off like here.

-wrap 3 loops of etape around the widest part of the plunger. The plunger is that white rubbery thing. Your darts can now be vacuum loaded. (hopefully you won't get any stefans stuck in because the AR will block them.

Edited by pwnchu, 25 October 2007 - 06:50 PM.

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#2 Spectre666

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Posted 16 October 2007 - 06:16 PM

Dude, you seriously need more pictures. Break it down, step by step, with at least one picture per step. Try using before and afters. Also, sho a picture of the final product.
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#3 pwnchu

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Posted 16 October 2007 - 07:03 PM

That will be kind of hard because i did this mod without pics first. But...

1. Open the gun. Then separate the two large orange barrel pieces, in the left side of the pic.
Keep the spring and poles on the right side of the picture (they are on the left and right side of the gun).

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(pic from customsnake202's mod)


You will find these AR pieces inside:

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(pic from pointblank's mod)

2. Take the right hand AR piece and drill a hole in it like so. You will not need the spring or the pole.
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(I have earplugs stuffed in them; they probably do nothing, so just ignore that).

3. Return the AR piece you drilled to the front barrel piece. Cut off the barrel.

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See the part my index finger is resting on? that's where the barrel was. There is still a bit of the barrel. You want it to look like this (although in reality i have a slanted cut that you can't see, which is bad).

4. Force a cpvc barrel down the front. I used 3" for stock darts.
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Use two hands for this; you need to keep the AR as far towards the front of the barrel piece, so hold it while pushing the cpvc through, until the cpvc is touching the AR. (edit: it works better if you dont push it in all the way, so you should just push it enough to keep air from getting out)

5. Wrap etape 3 times around the plunger. Now you can vacuum load.

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you're trying to increase the OD of the part my finger is pointing to.

6. Put the whole thing back together. Remember to replace the short poles that stick out the sides.

7(optional). If you have knex, build one of these:

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8. Jam the knex thing through the front sight. This will give you a ammo rack. The red stick on top should go over the round thing on the side of the sight to keep the rack facing in a favorable direction.

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To fire arrows:
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Put a cpvc coupler on the end and put the arrow over the entire coupler.
The stock darts can be fired while using the coupler.

edit: ranges are in 60s... not very optimal.

Edited by pwnchu, 25 October 2007 - 06:52 PM.

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#4 Spectre666

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Posted 16 October 2007 - 07:51 PM

Much better :)! Good job on the easy mod.

-Spectre

P.S. Awsome paint job.
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#5 Dragoon

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Posted 19 October 2007 - 07:07 PM

Good job on the mod and especially the paintjob. Looks sweet.
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#6 Liam

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Posted 20 October 2007 - 08:16 AM

I simply adore this mod you did, mostly because of it's simplicity and similarity to mine. I did a very similar thing where the dart sticks out of the end and I get about the same ranges you do. Thank you for posting this mod, I love it deeply.
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#7 Ubermensch

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Posted 20 October 2007 - 09:51 AM

I love the K'Nex Ammo holder. If only I could scrounge up my old sets...
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