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Homebrew drop FWD and RT system (56k ok)

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killernoodle View Drop Down
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    Posted: 21 June 2004 at 9:21pm
I decided that I cannot afford to spend too much money on my paintball gun because I'm going off to college soon, but I really want an RT system for my gun and a drop forward because the gun is too long already.  So, I went off to Lowes set on making a system for less than $10... This is what I came up with.





As you can see, it is a very simple design.

It uses a 1/2" copper pipe piece with two endcaps. One endcap is drilled to accomidate the plunger. The other is drilled to accomidate the fitting. The fittings are from the irrigation section of lowes where they have grass watering stuff. I used a T fitting in that one section so I could thread a bolt in there to control the airflow to the piston and so I could shut if off if I wanted to. The tube is 8 cents a foot in the plumbing section. The 1/2" end caps I used fit perfectly in the little slot in the handle, so I didnt need to reshape them or anything. The plunger is a piece of rubber I found bolted to an aluminum stud post I got in the lowes hardware section. I figured aluminum was better because it is lighter and can probably reciprocate faster. Instead of using the stock spring to reset the trigger, I put a very light pushing spring inside the piston to keep the piston against the trigger and to reset it if the piston is turned off.

I do need to get a double finger trigger now because the trigger guard interferes with the movement of the piston. When this is all done, I should be able to walk the trigger pretty quickly.

I also made myself a little drop forward out of some plastic I bought on ebay a while ago.  Basically, I cut out the shape with a jig saw and filed it down, then sanded it and put it over the stove a little bit to get it smoother. 



As you can see, it balances right on the trigger guard.  I took those pics 2 days ago, since then the bolts have been fixed and nuts have been integrated into the drop forward. 

It took a little modding, but I'm pretty happy with the results. If you would like a more detailed picture of something on the system, I can do it for you.

Enjoy


Edited by killernoodle
I make all my own mods.
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TippyFreaK03 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote TippyFreaK03 Quote  Post ReplyReply Direct Link To This Post Posted: 21 June 2004 at 9:53pm
id like to see a video if that really does work. nice work
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Post Options Post Options   Thanks (0) Thanks(0)   Quote maroon out Quote  Post ReplyReply Direct Link To This Post Posted: 21 June 2004 at 9:57pm
Awesome idea on the R/T.

Now I'm gonna have to make one.



Edited by maroon out
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killernoodle View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote killernoodle Quote  Post ReplyReply Direct Link To This Post Posted: 21 June 2004 at 10:04pm
I can, see that T fitting on the side?  I threaded a bolt in there so I can adjust the amount of air and shut if off if someone doesnt want me using it.

It works great, but I dont know about the video. Maybe I can take one with my dad's digital camera.  I cant do anything good yet without a double finger trigger.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote maroon out Quote  Post ReplyReply Direct Link To This Post Posted: 21 June 2004 at 10:07pm
Yeah my bad, I didn't see that the first time I read it.

I re-edited my post.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Barn Quote  Post ReplyReply Direct Link To This Post Posted: 21 June 2004 at 10:14pm
nice
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Post Options Post Options   Thanks (0) Thanks(0)   Quote -=Headwound=- Quote  Post ReplyReply Direct Link To This Post Posted: 22 June 2004 at 3:12am

I thought I had seen all the crazy home mods on the forum but I guess I was wrong!

That is really something killernoodle. How fast does your Response trigger fire?

P.S. Great Mod , All you have to make now is an Electric Hopper!

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Post Options Post Options   Thanks (0) Thanks(0)   Quote bowers182 Quote  Post ReplyReply Direct Link To This Post Posted: 22 June 2004 at 7:11am
was it that hard to do??  i think i might have to make one for my a-5 but it might be a little trickeyer.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote killernoodle Quote  Post ReplyReply Direct Link To This Post Posted: 22 June 2004 at 7:50am
No, actually it was quite easy. Basically, if you have a little patience and $10 you can do this mod, it doesnt require any special tools besides a drill and possibly a dremel. 

I'll write a how-to guide on the forums either sometime today or maybe tomorrow.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote killernoodle Quote  Post ReplyReply Direct Link To This Post Posted: 24 June 2004 at 8:21pm
Ok, a lot of people have been pming me about making the RT guide, but I have yet to do so because I havent worked out the bugs yet. Basically, I dont have a fresh tank to test it on.  The tanks that I have with me are all drained and it will be a while before I can get them all filled.  With the current tanks, I can feel the RT working but there is no "sweet spot" that I can find.  I believe this problem is due to the fact that all my tanks are less than 1/4 full.  Once I have the tanks filled and all of the problems worked out, I'll put up a guide.  Until then, you'll just have to enjoy the pics.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote You Wont See Me Quote  Post ReplyReply Direct Link To This Post Posted: 24 June 2004 at 8:43pm
Give this kid a star
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Jackal14 Quote  Post ReplyReply Direct Link To This Post Posted: 24 June 2004 at 10:16pm
amazing.... i wish i could do that stuff on my own.. and have it look good... the best i could do will have scratchs, electric tap, and crazy glue :(
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Post Options Post Options   Thanks (0) Thanks(0)   Quote <Ridd Quote  Post ReplyReply Direct Link To This Post Posted: 24 June 2004 at 10:34pm

Killernoodle..

Does your copper "body" fit inside the receivers correctly? What I mean does your plunger goes back and forth straight?

If not, I will go to the machine shop and fab you one if you need it, just give me the spec's...

The flow control tubing needs to be cleaned up some..but what you did is nicely done...

I am quite impressed!

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Post Options Post Options   Thanks (0) Thanks(0)   Quote meteora Quote  Post ReplyReply Direct Link To This Post Posted: 24 June 2004 at 10:40pm
lol kicken chicken man thats awesome!!!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote killernoodle Quote  Post ReplyReply Direct Link To This Post Posted: 25 June 2004 at 12:42am
The copper pipe fits in the reciever PERFECTLY.  I couldnt have made it fit better WITH a lathe :D.  I fixed the tubing so now it is tight, but you will need to take a dremel with a grinding wheel (the cylinder one, very small diameter) to the little plunger guide so that it slides freely. Yes, the entire system feels solid, and I can feel the RT working its magic (kinda), but my tanks are so drained that I'm maxing 180fps with the adjustment screw all the way out, so it is about time to fill the tanks.  My friend has a CO2 filling station at his house, but no CO2, so it may take a while. 

Here is my most recent pic, taken today.


 

Edited by killernoodle
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Post Options Post Options   Thanks (0) Thanks(0)   Quote evil-98 Quote  Post ReplyReply Direct Link To This Post Posted: 25 June 2004 at 12:48am

looking good. id love to see a vid

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Post Options Post Options   Thanks (0) Thanks(0)   Quote EFF® Quote  Post ReplyReply Direct Link To This Post Posted: 25 June 2004 at 1:00am

There has to be a 90° fitting going into the power tube/valve assembly (I think the tapped hole is #6-32, but I'm not sure).

Also the flow control line going into the brass tubing: what's keeping the tubing from falling out as the pressure gets higher?

The piston thing gotta move freely inside the brass tubing...not much pressure needs to push the piston out, but also beware that no c02/air should escape PAST the piston as well (is the piston is positioned straight of course).

Just curious, but overall its a nice job.

BTW, this is <Ridd..I'm on my son's computer but too tired to log him off and log me in..

 



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Post Options Post Options   Thanks (0) Thanks(0)   Quote killernoodle Quote  Post ReplyReply Direct Link To This Post Posted: 25 June 2004 at 1:52am
The power tube assembly is stock, it just has a 90 degree fitting epoxied into a hole I drilled into it.  Nothing keeps the tube on but friction (and plastic fittings and vinyl tubes are super hard to take apart.  The piston is sealed by a rubber bushing I bought at lowes and trimmed to fit.  There is a little air that escapes off the sides of the piston, but not enough to cause any loss of power.  If there was a super airtight fit between the piston and the walls, the piston would be sticky and not work well. I'll post pics of the build process when I make one for my brother.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote evil_fingers Quote  Post ReplyReply Direct Link To This Post Posted: 25 June 2004 at 1:59am
Thats the best mod Ive seen on a 98c and fer 10 bucks, man...can I say ghetto fabulous.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote maroon out Quote  Post ReplyReply Direct Link To This Post Posted: 25 June 2004 at 10:15am
What exactly did you make the plunger out of?
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