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The K.i.s.s-3

Pump-action and a few other improvements

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#1 davidbowie

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Posted 01 April 2006 - 05:19 PM

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So, I decided to build another KISS, this time a full-size rifle. For the life of me, I couldn't find any bigger bungees that weren't huge, so I decided to see how far I could stretch my 10" minis. I ended up with a sort of long pistol. That's fine with me, because I love long pistols.

There were a few problems with the KISS mini that I wanted to fix:

1) The barrel I used was originally made for a different project, so the length was pre-determined, and I wasn't using nearly the full potential of my bungees.

2) The cocking method, while it did provide for clip feed, was annoying, with or without the added bolt action stock. Bolt action and string pull both restrict the distance I can comfortably pull quite a bit more than pump action.

3) I realized that I didn't really want a magazine. I wanted a sleeker single-shot gun, meaning I had room to mess with the cocking method.

4) that 1/2" right angle grip is a bit uncomfortable, and it's downright ugly!

With these things in mind, I set out to make the KISS-3.

I determined the barrel length by mounting the bungee and stretching it to full capacity. It's quite a bit longer than the old one, 10" vs 7".

This gun uses pump action, which turned out surprisingly smooth and effortless. The action in itself is nothing fancy, just a tube which slides along the outside of the barrel and pushes back the bungee. It has a few outside sections glued on for grip, and the whole thing has a cutout to go around the clothespin. The rail on top keeps this cutout lined up.

Pump back:
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Pump forward:
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I finally got tired of using tee-fittings for grips, and made a standard 3-section angled grip, like bolt, ompa, and carbon use. The pipe is dremeled to fit the pipe's curve, then hot glued and zip-tied.

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The stock was more of an afterthought. I thought it would be nice, so I put one together.

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And, of course, here's one of me pwning the compost bin in my backyard.

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It may appear to be unpainted, but, in fact, it's painted white. I like white, especially this, as it's kind of a sandy, eggshell white. It won't last long, though, because pretty much everything on the outside of this gun is a moving part. I'll probably just end up sanding off the pipe markings.

I haven't done an in-depth study of ranges, but I was out shooting for about half an hour today, and I measured out about half my shots. The farthest shot I've gotten was about 91', and they average out at around 82', the lower decent shots are more like 74'. Some shots really tank and only go about 55', but that's a dart problem, not a gun problem.

The real issue with variation in range is with my stefan-making skills. If I had better darts that were less prone to spin out and just drop mid-flight, I would be getting 10-15' more consistently.

Overall, I'd say I'm fairly satisfied with this gun, but it's only a matter of time before I get tired of it and make a new version. I can't wait for that, because these would be REALLY awesome to dual-wield.
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#2 Maverick Master

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Posted 01 April 2006 - 05:43 PM

Wow that is really awsome. Everybody keeps throwing out these crazy home mades. Good thing I'm almost done :ph34r: . That really is very cool. If you put a bottom clip on that, I know you want to make a sleek single shot, but it would make for an awsome shotgun like gun. Nice work.
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#3 ompa

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Posted 01 April 2006 - 05:51 PM

Love the gun, hate the camera. Any chance you can get some clearer/cleaner pictures up? I'd love to see the gun in more detail, but the pictures are kinda fuzzy.

Bottom-clip for this would be difficult, just judging by his pump mech, since the pump seems to slide all the way down almost to the trigger, preventing the attachment of a bottom clip.

~ompa
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#4 davidbowie

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Posted 01 April 2006 - 06:07 PM

Yeah, bottom clip is a no-go. If I went about making clip-feed, I would either attach a short 3-5 round clip to the top of the pump handle that moves with the pumping motion or try to adapt ompa's tube clip to run inside the pump handle, as I need a spacer there anyway. I'll be making another gun soon, so I'll try the tube clip with that.

And yes, the camera is horrible. It's a camera phone. I'll try and get some clearer pictures with it, but no guarantee.

Were there any specific parts you wanted to see close-up?
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#5 ompa

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Posted 01 April 2006 - 06:15 PM

Not really, I just wanted to see the gun in general, with detail that I could actually make out.

No big deal if you can't, just personal preference.

~ompa
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#6 davidbowie

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Posted 01 April 2006 - 06:25 PM

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Well, it's a little better.

That's probably the best quality picture I can get. You can generally see things, but it's still real grainy and the contrast leaves a bit to be desired.
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#7 Carbon

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Posted 01 April 2006 - 10:49 PM

Man, the usability and the aesthetics of each succeeding KISS keep getting better. This one really looks comfortable to wield and shoot. Nice job with the pump, as well...the guide rail on top is a nice addition to keep it steady...with the benefit of making it look a little less skinny.

Uriel mentioned this on the HQ, but yeah, it would be cool to play out the crossbow-like looks and give it some small arms at the front, although I'm not sure if that would detract from the range or not. Anyway, the KISS always makes me think of Dark Elf handheld crossbows from the Forgotten Realms books....
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#8 GeneralPrimevil

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Posted 01 April 2006 - 11:02 PM

These K.I.S.S.s do keep looking better and better, more tempting to make with each new model, but I had a bad experience with this beast...If it looks, acts, and shoots like a crossbow, then it is a crossbow.

Really nice work, however.
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#9 davidbowie

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Posted 02 April 2006 - 03:08 PM

I've been thinking about clip feed. I decided that the best way to go is a tube clip. So, I've come up with this:

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I'm no paint wizard, but I think it's all fairly clear from that drawing. The grey bit in the back of the barrel is a bolt which is pushed back by the bungee when the gun is cocked. It has a rubber band to return it forward when the gun is fired. The tube clip goes over the top of the stock. The darts are advanced by a rubber band.

What do you think?

Edited by davidbowie, 02 April 2006 - 03:08 PM.

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#10 GeneralPrimevil

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Posted 02 April 2006 - 03:27 PM

I think that I'm gonna take some of those concepts and use them for a project I have.

That, and I like it (duh, I only want to take the design). If I find the time to, do you want me to make some Paint images that describe it a bit better?

Oh yeah, I'm gonna mess with that design so that I can use something which holds my darts better and suits the special project a bit better...

Edit: I also think that that was your 200th post. Congrats?

Edited by GeneralPrimevil, 02 April 2006 - 04:45 PM.

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