[CuppaSteve]

My hardware-store friendly OHPB: It works! Or at least... It worked. After a few shots the catch notch got worn down, and I decided I had already worked hard enough, so it'll be working perfectly soon enough.

Pros:
•Hardware-store friendly, not a single bit of polycarb.And although I used a K25, any spring can be used. I even made a homemade washer out of gasket seal, and the wye is a homemade one I made a few months ago along with the homemade dart door.
•You prime it with one hand. It's awesome.
•The 2" plunger moves a massive amount of air. About 3 times as much as a Longshot, and about 1.3 times as much as the average SNAP.
•Besides the fact that my catch notch got worn down, pipe ring catches are awesome. I'll definitely be using them more in future homemades.
•Considering my homemade washer has a terribad seal compared what probably would have come from the skirt seal that Diamondback originally used, the ranges aren't that bad. I don't want to give official measurements yet though, since I haven't found a proper barrel length.
•Fast primes. It's only slightly slower than a well-made pump action blaster.
•The internals can be exposed by unscrewing 3 screws, and the blaster can be completely disassembled by unscrewing 2 more.
•Can be used to bludgeon people to death in the event it stops working properly.
•Solid despite only two screws hold the body together.
•Comfy, and can be trimmed up during creation for pretty much any-sized person.
•It's one-handed. You could theoretically dual-wield this.

Cons:
•Even with a measly 4-inch draw, this blaster is still massive. Increasing the draw would make it less ergonomically-friendly, and due to the priming nature of this blaster, that's a no-no.
•Like I said, it's big. About 27" without a barrel (twss)
•I haven't found a proper barrel length yet, but I assume it's going to be long because of the plunger volume, which will make it the longest blaster I own.
•Kind of heavy. Dual-wielding two of these would slow you down significantly, even though you would probably be the most menacing-looking person on the field.
•Took about 4 hours total to make. Certainly that could be chopped in half with some practice, but it was still annoying.

With fields that are being dominated by PumpSNAPs, RevShots, RBP's, etc, I found Diamondback's design to be quirky and fun when I first read it, so being able to make it a more accessible to those of us without scrollsaws was a very fun experience. Props to him, Beaver for the pump-action design that I used on this, and Razgriz for his version of the Pipe-Ring Catch.

This post has been edited by CuppaSteve: 22 November 2011 - 10:03 AM

[HasreadCoC]

Well, here is a rainbow I built for my friend Darkmatter.
Specs:

it utilizes a full K26,

1.5"plunger tube,

has two catch notches for the user's choice of draw (7" and 5.5"),

custom pull-back piece for finger comfort and style,

Brass eagle talon handle (thanks for the inspiration, Beaver),

custom machined sliding trigger that allows the PT assembly to be located farther back, thus allowing it to be 4" - 5" shorter overall,

SUPER-STURDY LOTSA SCREWS,

great sealing U-cup,

padded with foam,

able to have a detachable stock added via the port in the bottom of the handle, in the process of designing one now, may update this post,

the whole thing (barrel-less, unprimed, stock-less) is only a hair over 17" from tip to tail.

Pics:















Probably my favorite thing I've built yet.

[Jilliop]

My version of the JSPB Mad Ghost thing by 3DBBQ. Huge bike pump, therefore huge tank. The trigger is actually not the second check valve, but rather a combo of Mr. Badwrench's and the WNTS. It leaks all over the place, and holds enough air to fire for about 7 seconds. Two pumps merits about 80' flat. Three gets more, but I haven't checked. More than three and you risk busting the thing. It's very rickety, but it works, and that was my goal!

[Daniel Beaver]

I made several of these blasters with 1" PVC telescoped into 1-1/4" PVC. The front of the plunger tube pushes back against the plunger head, similar to how longshots work. Test video, showing the priming motion of the last blaster.

This post has been edited by Daniel Beaver: 25 November 2011 - 05:54 PM

[TheSilentRebel]

Here are the results of my Thanksgiving break:



Pumpsnap with a 7" draw and a string stop.



My first polycarbonate homemade, a tradtional +bow. Wood handles>Polycarb handles.

[rego]

After seeing carbon's 7.5 pump crossbow I was greatly inspired.I then decided I wanted one and got to work.
Specs: 4.5 inches of draw
.5 cpvc bow arms
38'' long 40'' wide
measly 4'' cpvc barrel
10-15 shot hopper

The trigger,handle,slots,and plunger.

[andtheherois]

Finished my first +Bow. A few extra holes but it works great. 3/8" side plates are going to make this thing hard to break.

(Edit to avoid double posting)

My old pumpsnap got a sanding and a new slide, plus new wood furniture. This is how I ended up doing the last two pumpsnap commissions I had. I must have ravaged my own slide with no breaking or wear in the wood. The handles are ladder sanded to 40 grit, and are comfortable as hell.


Hongfui's Pumpsnap. He didn't want it painted. Shoots crazy hard.


Made another +Bow for someone, but he requested that It be taken apart when shipped, so I never fully assembled it. This is the only picture I took of it. Sorry for the blurriness.

(Edit to avoid triple post)

Finished a shortened pumpsnap commissions for someone on NRev. Clear hopper, 12" Barrel, Normal CPT rather than a sliding trigger. Foregrip instead of just a sleeve makes it comfortable to prime. Boltsniper style grip with a twist for added comfort and stability. Spring hits full compression. Seal is perfect. This thing is awesome, and a ton of fun to play with.


Close up of the trigger.


Almost everything is mechanically fastened, except where the handle meets the "handle coupler." However that handle is still rock solid.


MONEY SHOT


Finished a Soul eater themed Pumpsnap for Keo

(these next few photos wont make sense unless you've watched/read the anime)



Scythe blade foregrip


Moon shaped trigger.
Scythe eye

This post has been edited by andtheherois: 09 December 2011 - 12:22 AM

[Zorn's Lemma]

Suboptimus primary
Built on the fallopian rev 2 platform



It's like Christimas

[pSyk]

"I AM STOCK" blaster.

A Ring Catch Blaster that I made, based off my knowledge of an R3 (credits to SGN for the R3 design.)

- 40mm plunger tube, 6inch draw.
- Delrin rod, sleeved in Europet PETG with a "slot" for the catch.
- Internalised and closed Ring Catch design.
- Holds a full-length K26 spring with 2 x stock Recon springs sleeved over.



Hits about 80+ feet, because the plunger head doesn't give me a perfect seal.
All-Singaporean parts.

[andtheherois]

Finished my first pumpbow. Took a few days between school and social obligations, but it works. Considering I only had pictures to go on, I'd say I was pretty successful. The next one should turn out a lot better now that I know what I need to do instead of randomly cutting and pasting.



Makes the stock 115% more sturdy.

[ChaosPropel]

So after my personal-use Snapbow broke at DCNF2 (after serving me through most of the day, very well) bcak in September, I've been meaning to build another one. I originally intended it to just be a standard snapbow, but, along the way, I, well, decided to give it some smexy upgrades.

Here she is:

She's rocking a custom cut poplar wood thumb-hole stock (thanks to Langley and Andtheherois for inspiration for the stock design), completely sanded, rounded, and smoothed with 320 grit sandpaper. This thing is amazing to hold.
The snap also has a 1/2" PVC foregrip, as well as a very smooth trigger. The board at the back of the stock is 1/4" thick wood, I believe it's poplar as well. The stock rod at the top is 3/4" oak dowel. Bushing is a 1" x 1/2" hex bushing, pretty standard. Standard superlative plunger head seal.

Closeup on the stock:


There's also some black foam at the back to pad the stock, making it hella comfy to hold/wield:



This beast is seriously awesome to shoot. It uses a 12" plunger tube, and has a little over 6 inches of draw, making it very wieldy while maintaining a nice amount of power. I really like it, and I anticipate it being (one of) my primaries for a while.

Everything on this is completely mechanically fastened, with the exception of the foregrip (PVC pipe) to plunger tube connection, which is glued with large amounts of high-temp hot glue, simply beause putting screws there would be ruinous.

[TxNerfer]

Haven't made any blasters in a while, and I needed a primary for an upcoming war, so I threw together one of Beaver's pumpsnaps.



I had one minor improvement from the original. Instead of using a threaded bolt as the priming bolt, I found this. It's smooth where it runs along the slot, unlike a fully threaded bolt, but it's threaded at the end, so you can put a nut at the end to hold it in place.



Installed:



Also, I did a minor improvement to handles from nerf shells. Not sure if this is useful or not, but I filled the handle with epoxy putty, then cut a polycarb piece the same size as the top on the handle, then solvent welded and screwed it into the epoxy putty. Then I screwed the coupler into the polycarb piece.

[thesoxfan1234]

I made a Pumpbow! It still needs the bracket to keep the pump from going up. But Its finished! Took me a long time to finish it and im happy with it. IT uses a K25 for an easier prime.

[ChaosPropel]

I've put aside my pumpbow project to work on a Fallopian Mk2....here's what I have done today, which I did over about 3-4 hours of light labor with some breaks and a dinner.

You can see that I have the plunger rod done (except the catch notch, which will come last). This was a real challenge, as in the Fallopian, at least under my measurements (which include 6" draw), there is 13.5" room for a spring. However, the k25 I'm using is only 11"-that means I need a 1.5" spacer at the front of the plunger rod, behind the head. I used some 1/2" PVC, superglued to the 1/2" delrin plunger rod. However, the K25 still rode up the PVC, so I made a custom disc out of a PVC endcap (too lazy for polycarb, lol), with a 1/2" hole, and an OD big enough to hold/block the spring, while small enough to still slide in the 1" PVC inner float support. That's the white thing you see. Then there is etape under/to the left of that to stabalize the K25/center it.
There's also the rainbow catch I made for it and the SSSB stock I'll be using, similar to Zorn's original build.
I hope to get this finished up tomorrow morning.

This post has been edited by ChaosPropel: 06 January 2012 - 06:45 PM

[One_long_shot]

This is the valve I've been working on for the past few weeks. Version 2 will be smaller and much more efficeint. This sucker's made out of 1" PVC and eats an entire breakfast, lunch, and dinner of air in one shot...



There it is in reference to my crossbow. They look oddly alike, don't they?

This post has been edited by One_long_shot: 06 January 2012 - 07:50 PM