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Member Since 23 Apr 2008
Offline Last Active Jul 16 2011 09:55 PM

Topics I've Started


27 December 2009 - 01:40 AM

I present to you the RSCBow. It’s basically a SNAP or SNAP bow design scaled up to 1 ½ in. PVC, with 2 eight shot RSCB sections made into nice stock. I used ideas from Carbon’s original SNAP mk2 design and wood grip design, Rork’s SNAP bow mk4 design and superlative head, and the RSCB guys.
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Materials Needed:
1 12” Length of 1 ½ in. PVC (can be shortened to 11” without any effects)
2 1 ½ in. by ½ in. PVC Bushings
2 1 ½ in. couplers
1 ½ in. PVC ball valve
2 ½ in. CPVC tees
1 ½ in. CPVC elbow
1 ½ in. PVC coupler
1 ½ in. PVC tee
1 ½ in. PVC endcap.
1 12 in. length of ¼ in. PEX pipe
1 +bow spring
1 clothespin, zipties, nail, all the stuff you need to make a clothespin trigger
1 1 ½ in. washer
1 rubber sheet
1 CPVC endcap
1 Belleville washer
½ in. PVC
½ in. CPVC

Part 1. RSCB stock.
This is probably the easiest and in my opinion the most useful part of this gun, as it can be used in virtually any nerf gun with enough power.

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To make one of these for darts that fit CPVC, I’ve found the best way is to use CPVC fittings for the T section of the RSCB (the elbow and tee). Then, I use a ½ in. PVC couplers lightly sanded/reamed out and shove the CPVC fittings tightly into PVC coupler. I’ve found that ½ in. CPVC fittings are only slightly larger in diameter than ½ in. PVC, and will usually fit into ½ in. PVC fittings with a little force. The CPVC tee is reamed out completely on the side facing the PVC, and the CPVC barrel I use on the other side is reamed out completely as well. See below:

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I personally believe this is the most efficient RSCB setup in terms of dead space, and the smooth transitions due to the reaming have almost never given me a double fire on any setup I’ve used, including big blasts.

The rest of the RSCB stock is made of 2 sections of PVC with a ball valve in between. I made mine able to hold eight 1 ½ in. stefans, so about12 in. long each. You can make it as long or as short as you want, as long as the one closer to the air supply holds equal or more darts, or else the ball valve will eat your darts. The way it works is you fire all eight stefans with the ball valve closed, then open the ball valve and shake until the darts fall into the next section. Once you close the ball valve again, you can reload the back at any time.

The stock part is shown below:

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I shoved a crayola marker barrel wrapped in tape into the pvc section. This allows for easy loading, as darts can be loaded in but won’t fall out because they fit snugly in the marker area. The PVC tee is cut down for comfort and a short section of PVC with an endcap was used for the stock. The whole setup is very stable and if you cut it to the right length, very comfortable.

Part 2. Plunger rod assembly

This is very similar to the setup Rork created in his last SNAP bow design, using ¼ in. PEX pipe for lightness and cheapness, and a similar plunger head to his superlative plunger head design.

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I found the rubber sheet in the plumbing section of Lowes for about 2 bucks. It comes in 2 different thicknesses, so I chose the thicker one; I think it was like 1/8th in. or something. Basically, it allows you to cut custom rubber washers of any size and shape you need, which was great because I couldn’t find 1 ½ in. rubber washers anywhere.

I traced the inside of the 1 ½ in. PVC coupler and cut it out using scissors. This turned out to be a little too big, so I trimmed it down carefully using a utility knife until it fit snugly into 1 ½ in. PVC with a concave shape and was airtight. Patience is key here; you don’t want jagged edges, or for it to be too small or else it’ll be useless.

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The order for the plunger head goes top to bottom from left to right. I ended up using a different bolt and wing nut, but basically it was the same. First I centered and drilled a hole in the CPVC cap for the bolt. Then, I roughed up the surface of the cap and superglued the flat washer to it. Make sure you carefully superglue the concave washer to the top of the flat washer, using superglue liberally around the seams. Then poke a hole through the rubber washer, and bolt everything together. The setup is shown below.

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The next step is to make an epoxy putty ramp against the flat washer to allow the trigger to smoothly catch.
When you are finished, put a short stub of CPVC in the endcap and drill a tiny hole through the endcap, the CPVC and the PEX at the same time. I wrapped e tape around the PEX until it was snug in the CPVC. Now your plunger head is complete.

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The pullback handle was made from a CPVC tee, CPVC, a short screw and gratuitous amounts of epoxy putty.

Part 3. Rest of SNAP and Carbon style wood grip

The main plunger tube in this gun was 12 in. long, but looking back you could definitely get away with 11 in. or maybe even 10, as the spring is only 11 in. long, and there is extra length from the coupler and bushing in the back.

Both the 1 ½ in. couplers in the front and back were cut down on one side about halfway from the edge to the middle. In the back coupler, this serves to allow room for the air hole on the bushing while saving space. The air hole in the bushing was cut using a ½ in. spade bit. For the front, the 1 ½ in. to ½ in. bushing was also cut down to reduce dead space. The part was cut to about where the flat section begins.

Fit the back coupler and the bushing together, then drill pilot holes for screws through both parts. I did three spaced equally around the part.

Now for the handle, this gets a little tricky. In Carbon’s original design, a section was cut out of the coupler to allow it to snap on, but because in this design the coupler is actually used as a coupler, I chose to leave it whole. Unfortunately, this meant drilling and screwing the handle on with screws at a slight angle.

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I tried to counter sink the screws as much as possible, but they still stuck out and made fitting the bushing and plunger tube on impossible. I dremeled a small groove into the bushing and plunger tube for the screw head, which worked like a charm. This also helps align the screw holes when you disassemble and reassemble the gun.

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Assemble the RSCBow and it is almost completed. Make sure to put the rear bushing and spring on the plunger rod before you screw on the plunger head. The next part is to add a clothespin trigger, which you can read about in Carbon’s guide to SNAP’s. The plastic clothespin I used was unfortunately pretty flimsy, and would nearly fly apart after being fired, so it is currently held together with rubber bands, which may be ugly, but work. In addition, to prevent said destruction, I put a block of wood behind the trigger to limit the trigger pull length, which prevents the pin from being pulled completely out and exploding.

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Attach the RSCB stock to the RSCBow by forcing the CPVC elbow into the front bushing. This is the most efficient and compact way to attach it, and it is pretty sturdy due to the CPVC being slightly larger than ½ in. PVC. An optional reinforcement would be to take a metal strip and secure the ball valve to the rear coupler with screws, which I haven’t done but will in the near future.

Now you to can make your very own RSCBow. For those of you scared to make homemades, I have to say this was my first one, and it was a lot easier than I expected it to be. It’s very convenient to be able to make something exactly to your needs. I haven’t tested ranges, but I’d assume due to the extra plunger volume and increased deadspace from the RSCB stock, it gets similar ranges to SNAP bows and the like. Right now all I have is an 8 in. cpvc barrel on the end, but I may go longer.

Thanks for reading guys. QCF’s?

Edit-Pictures weren't right.

Deodorant Turret

19 February 2009 - 12:35 AM

That’s right, just when you thought you were done with deodorant sticks, here’s another one. I give you…the deodorant turret.

Materials Needed:

Deodorant Stick
5/8 in Spade Bit + Drill
Cylinder sanding bit
½ in. CPVC and coupler
O-ring with OD the same as CPVC


Epoxy Putty

Okay, so here we have our empty stick of deodorant. This one was a Degree kind, and it has a bottom portion that swivels to raise/lower the stick.
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The first step is to wash out the leftover gunk and remove the stickers. After doing this, you should have an empty stick. Use scissors to cut out the four tabs at the bottom that attach this little stick to the rest of the case. You can’t see the tabs, but the stick is shown below.
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Now, cut the case at 2 ½ in above where the rotating piece begins. Then, cut a strip from the top 1 in tall, and set it aside for later.
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Now, at the bottom of the top part, on either side there is a ridge sticking out. Unfortunately, no flash= no picture of ridges, so use your sanding bit and grind those out.

The next part is one of the trickiest. Using your 5/8 in. spade bit, slowly and carefully drill through the bottom of the stick and through the top portion at the same time. Make sure your hole is centered, it should fit pretty perfectly though.

Who’s a happy turret?
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Make sure to clean up all those cuts with a utility knife because after this point it will be hard to. Take your CPVC barrels and fit them through the top portion until pretty much flush with the hole. The face is not flat, but kind of slopes down. You will need to sand this until it is pretty flush with the face. What I did was used a marker and colored where the barrel stuck out, and then ground that down. Also, draw a line down the barrel and onto the turret for alignment purposes.
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Next, glue your barrels into the top portion, making sure that the back is flush and the barrels are straight. I used hot glue, but superglue or epoxy would probably be much better. Use the other ring of plastic you cut earlier to help with alignment.
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Now glue the barrels to the ring to stabilize them more. Also, I filled in the arrows on the bottom with putty so I could sand them off later and possibly paint.

The final part is the trickiest, and I am still trying to get everything to fit and seal right, but it should after some tinkering. Cut a short piece of cpvc, that should be long enough to fit into a coupler and reach the back of the barrel from the bottom of the deodorant stick.
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This will also need to be shaped to be flush with the curve. Try to make it a tiny bit to allow space for the o-ring. Now, superglue the o-ring to the CPVC. This will help make a good seal onto the barrels, and keep that o ring from going anywhere. Test fit the coupler assembly into the back to see if it seals correctly. This will probably take a few tries to get it to seal but not drag the turret.
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Once the seal is good, you can glue that sucker in. Same here, superglue or epoxy would be best because this is going to be where most of the strain is.

At this point I’ve stopped, because I don’t have a working gun that needs 8 in CPVC barrels. One thing I would like to note is that you can probably add 2 more barrels on either side making this a four shot turret like the AT2K. My goal was to make a rear loading, easily turnable turret using commonly available materials, because AT2K’s are sometimes hard to find. I realize that there are already many homemade turret designs such as bobafan’s and rork’s, but this one is an alternative. As for securely mounting this onto a gun, I would suggest either gluing the bottom of the stick, or better, using a nut a bolt combination through the rotating piece. Anyways, hope you liked my first hopefully original modification, and thanks for reading.

Now I open the floodgates to flaming and suggestions.

Glue Gun Exploded

17 January 2009 - 01:15 AM

So I searched for glue gun repair, glue gun fix, and hot glue gun, but couldn't find anything. Anyways, for the past couple of days, I noticed that my glue gun would eat up glue sticks while not putting out hardly anything. Also, I have accidentally left it on for long periods of time, so I probably destroyed something because of that. Well, today it finally stopped working, and I was wondering if it was worth/possible to fix.

blurry cell phone pic.
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The glue had leaked into the guts of the gun and glued the trigger shut. Is there any way to fix this leak?

Thanks in advance.