Homebrew drop FWD and RT system (56k ok)
Printed From: Tippmann Paintball
Category: Paintball Equipment
Forum Name: Upgrades and Customizing
Forum Description: Trick it out!
URL: http://www.tippmannsports.com/forum/wwf77a/forum_posts.asp?TID=103156
Printed Date: 13 July 2025 at 4:44am
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com
Topic: Homebrew drop FWD and RT system (56k ok)
Posted By: killernoodle
Subject: Homebrew drop FWD and RT system (56k ok)
Date 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 
------------- I make all my own mods. |
Replies:
Posted By: TippyFreaK03
Date Posted: 21 June 2004 at 9:53pm
id like to see a video if that really does work. nice work ------------- The A-5's days are numbered... Now I be rockin teh' 05' Vision Shocker w/ Nerve Board 
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Posted By: maroon out
Date Posted: 21 June 2004 at 9:57pm
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Awesome idea on the R/T.
Now I'm gonna have to make one. 
------------- Watch your thoughts they become words Watch your words they become actions Watch your actions they become habits Watch your habits they become character Watch your character it becomes your destin |
Posted By: killernoodle
Date Posted: 21 June 2004 at 10:04pm
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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. ------------- I make all my own mods. |
Posted By: maroon out
Date Posted: 21 June 2004 at 10:07pm
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Yeah my bad, I didn't see that the first time I read it.
I re-edited my post. ------------- Watch your thoughts they become words Watch your words they become actions Watch your actions they become habits Watch your habits they become character Watch your character it becomes your destin |
Posted By: Barn
Date Posted: 21 June 2004 at 10:14pm
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nice ------------- Do You like It?? ...I Love It |
Posted By: -=Headwound=-
Date Posted: 22 June 2004 at 3:12am
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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! ------------- Tippmann 98 Custom GTA Response Trigger Crossfire 68ci 4500psi Palmers Stabilizer Male Halo Frontman Smoke LED 12" All American Smart Parts Wood Grip Grey VForce Profiler |
Posted By: bowers182
Date Posted: 22 June 2004 at 7:11am
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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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Posted By: killernoodle
Date Posted: 22 June 2004 at 7:50am
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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. ------------- I make all my own mods. |
Posted By: killernoodle
Date Posted: 24 June 2004 at 8:21pm
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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.
------------- I make all my own mods. |
Posted By: You Wont See Me
Date Posted: 24 June 2004 at 8:43pm
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Give this kid a star ------------- A-5 E-Grip JCS Dual Trigger DOP X-CORE 8 stage x-chamber Lapco Bigshot 14" Beadblasted Optional setup: R/T Dead on Blade trigger |
Posted By: Jackal14
Date Posted: 24 June 2004 at 10:16pm
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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 :( ------------- -Tippmann 98 Custom 14" J&J Ceramic Palmer Stab (Female-ASA) -Tippmann 98 Custom 12" Teardrop |
Posted By: <Ridd
Date Posted: 24 June 2004 at 10:34pm
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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! |
Posted By: meteora
Date Posted: 24 June 2004 at 10:40pm
| lol kicken chicken man thats awesome!!! |
Posted By: killernoodle
Date Posted: 25 June 2004 at 12:42am
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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.  ------------- I make all my own mods. |
Posted By: evil-98
Date Posted: 25 June 2004 at 12:48am
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looking good. id love to see a vid -------------  |
Posted By: EFF®
Date Posted: 25 June 2004 at 1:00am
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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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Posted By: killernoodle
Date Posted: 25 June 2004 at 1:52am
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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.
------------- I make all my own mods. |
Posted By: evil_fingers
Date Posted: 25 June 2004 at 1:59am
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Thats the best mod Ive seen on a 98c and fer 10 bucks, man...can I say ghetto fabulous. ------------- Do not steal....the government hates competition! 
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Posted By: maroon out
Date Posted: 25 June 2004 at 10:15am
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What exactly did you make the plunger out of? ------------- Watch your thoughts they become words Watch your words they become actions Watch your actions they become habits Watch your habits they become character Watch your character it becomes your destin |
Posted By: <Ridd
Date Posted: 25 June 2004 at 10:20am
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No...that is not true... Look at the pic below. This is a gta r/t kit. While plugging the hole with my thumb and while trying to force the piston down STRAIGHT into the tubing with my other finger..it's really hard to do,in fact you can't do it, but when you put the piston at any angle inside the tubing, there will be aire leakage. The 2nd pic actually shows how well the specially shaped gasket/oring? prevents air leakage.
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Posted By: killernoodle
Date Posted: 25 June 2004 at 11:00am
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The guide on the gun's handle keeps the piston straight, it is a very
close fit. I'll cut another gasket today to see if that helps a
little. The one I cut before was with scissors and it is not
perfect. The plunger is an aluminum post screw, it is basically what looks like a large nail, but what would be the sharp end is cut off, threaded, and has a screw in it. I'll see about the gasket today. ------------- I make all my own mods. |
Posted By: pballer1504
Date Posted: 25 June 2004 at 1:03pm
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lol it the next macgyver. very nice job on the upgrade man. keep up the good work. ------------- Shocker-stock,for now Xbox Live Gamer Tag: Godfather1504 mostly play halo 2 favorite quote: "for those who said this day would never come, what are they to say now." |
Posted By: <Ridd
Date Posted: 25 June 2004 at 1:22pm
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I think so too... I just I wished I had thought of it first! Did you ever made those changes yet? Or got some C02? |
Posted By: killernoodle
Date Posted: 25 June 2004 at 3:13pm
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Not yet, I would go today but I have to work :(
------------- I make all my own mods. |
Posted By: maroon out
Date Posted: 25 June 2004 at 3:29pm
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I talked to your boss.
He said to go home for the day. And then to go get some co2. ------------- Watch your thoughts they become words Watch your words they become actions Watch your actions they become habits Watch your habits they become character Watch your character it becomes your destin |
Posted By: Die-Trying
Date Posted: 25 June 2004 at 3:31pm
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See what boredom can accomplish.
to bad i already bought my r-t. ------------- Ion sanded and bondo'd body Orange painted body and frame Dead On Bullet Drop Evo II 68/4500 crossfire Evil pipe kit with ultra tip |
Keep up the good work.
Posted By: <Ridd
Date Posted: 25 June 2004 at 3:45pm
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I needed it today! I'm just curious what are the "actual" fab costs to make the GTA RT. I know there is other factors as well (advertising, etc.) But think about it. Look at the parts and tell me it doesn't cost more than 10-20 bucks.. |
Posted By: killernoodle
Date Posted: 25 June 2004 at 10:03pm
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It doesnt cost more than 10-20 bucks.. Actually, with mass production I'll bet it is less than 5.
------------- I make all my own mods. |
Posted By: killernoodle
Date Posted: 28 June 2004 at 12:25pm
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Ok, just an update: Took apart my gun today and updated the sealing system on the piston. Now there is a much more airtight seal and there is resistance when the hole is blocked and the piston is very tough to move when doing so. The actuation is much stickier now, but when the RT is going I guess it doesnt matter much. Now I gotta wait for the epoxy to dry so I can test it out, but I have to work 3-11 tonight, so I'll update again tomorrow.    ------------- I make all my own mods. |
Posted By: maroon out
Date Posted: 28 June 2004 at 12:59pm
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I'm still confused as to what you made the plunger out of.
Gasket? Rubber washer? Somehow mounted an o-ring? Picture maybe? ------------- Watch your thoughts they become words Watch your words they become actions Watch your actions they become habits Watch your habits they become character Watch your character it becomes your destin |
Posted By: Trigga Nometry
Date Posted: 28 June 2004 at 1:19pm
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That's some good work! Real good post! -------------  |
Posted By: killernoodle
Date Posted: 28 June 2004 at 1:23pm
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I'll post a picture of the finished revision so people dont go trying
to make a crappy one. It is made of rubber, but the previous
rubber became soft when it was used, making it useless. I gtg to
work now, but I'll post either tonight or tomorrow morning.
------------- I make all my own mods. |
Posted By: NMLvaio
Date Posted: 28 June 2004 at 1:45pm
| nice jop |
Posted By: crazedloon
Date Posted: 28 June 2004 at 2:44pm
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what did you epoxy sweet mod by the way |
Posted By: 98CustomPerson
Date Posted: 29 June 2004 at 9:09pm
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Do you have to buy a new powertube for this mod? I know when you buy the r/t, it comes with a new one. What's different between the two?
By the way, great idea on the r/t. It stinks that I just spent 6 hours trying to get the LED light mod going. Now that it is working, I'm going to have to take it out. Also, the GTA r/t comes with a stronger sear spring to keep up with the bolt moving at faster rates. Will we need to do purchase that from Tippmann? If you've tested it out, or even a beta model, please tell how it works. |
Posted By: alaskanpro
Date Posted: 25 September 2004 at 10:54pm
| I know this is an old toppic but could someone show me pics of this homade responce trigger |
Posted By: alaskanpro
Date Posted: 25 September 2004 at 10:55pm
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how do you adjust the speed or the response |
Posted By: alaskanpro
Date Posted: 26 September 2004 at 10:51pm
| could someone please respond |
Posted By: Ice1
Date Posted: 01 February 2005 at 2:13am
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i know this is an old topic but the guy who made the RT, could you please re-host al your images? try imgspot.com they have always served me well and my sig has been hosted with them for about a year thanks Ice ------------- 
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Posted By: B_Wet A-5
Date Posted: 01 February 2005 at 11:18am
pics not working for me.  i want to see i feel left out.------------- I need smallers sigs. AVIATOR GANG 
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Posted By: You Wont See Me
Date Posted: 01 February 2005 at 3:59pm
------------- A-5 E-Grip JCS Dual Trigger DOP X-CORE 8 stage x-chamber Lapco Bigshot 14" Beadblasted Optional setup: R/T Dead on Blade trigger |
Ice1 wrote:Posted By: Cheeky
Date Posted: 01 February 2005 at 7:53pm
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great jobs sounds nice pics aint workin for me but sounds awsome last time i try something custom i ended up spending more than it would cost to just by it from the acctual maker
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Posted By: Cheeky
Date Posted: 01 February 2005 at 7:55pm
| now im just waiting for someone to make a homemade e-bolt or e-grip |
Posted By: You Wont See Me
Date Posted: 01 February 2005 at 8:22pm
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People! the reason the pics arent working is because this thread is over a year old!!! Stop bumping this up. ------------- A-5 E-Grip JCS Dual Trigger DOP X-CORE 8 stage x-chamber Lapco Bigshot 14" Beadblasted Optional setup: R/T Dead on Blade trigger |
Posted By: maroon out
Date Posted: 02 February 2005 at 10:54pm
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I have the pictures on my computer somewhere.
I'll post them up tomorrow if I have time. ------------- Watch your thoughts they become words Watch your words they become actions Watch your actions they become habits Watch your habits they become character Watch your character it becomes your destin |