27 replies to this topic

[Carbon]

I've always been fond of the SNAP-2, but it had some design problems. Range was limited by the 7" long plunger body (necessitated by the huge slot in the side), to say nothing of the potential for injury when the plunger handle flew florward ("flying metal"). These didn't keep it from being fun to shoot, though. Likewise, the SNAP-1 has better mechanics, but was missing a stock, and the fun "bolt" aspect. So, I combined elements from both.



The plunger is a standard SNAP plunger. Instead of an endcap, though, I used another reducing bushing (same as in the front). This is the same as the SNAP-2.



The stock is where things are a little different.




I cut a slot to allow a pull to be attached to the chargerod. Currently, I'm using a split keyring, but it isn't working that well. My plan is to use a short threaded rod, and then use wire nuts or some manner of rounded knob at either end. The gun could then be primed with two fingers on the stock, and the danger of "flying metal" is gone. A nice side benefit is that the spring can be removed by simply removing the stock (same benefit that the 2 had).

This gun needs a bit of tuning (trigger is fussy, and I'm going to fix the pull), but is otherwise done. You could practically call this a mod, as you could do this to pretty much any SNAP: swap out an endcap for a reducing bushing, and cut a slot in a stock.

Edited by Carbon, 22 May 2007 - 11:04 PM.

[privateer]

Consider it done. Screw work, tomorrow I'm fixing up my two SNAP-1s.

Great work.

[Rambo]

I like it. I'll be honest, though, I've never actually read the writeups for 1 and 2.

Any reason not to turn the plunger rod sideways and make a cocking handle like on the Sawtooth/Longshot?

[Carbon]

RAMBO, on May 22 2007, 11:12 PM, said:

Any reason not to turn the plunger rod sideways and make a cocking handle like on the Sawtooth/Longshot?

None at all. I was thinking sideways at first, but decided to try up-and-down. I'll see which works best when I get parts to finalize the pull rod.

[SHADOW HUNTER ALPHA]

Nice work as always, Carbon. Good thing that you managed to remedy that "flying metal" issue. Given more time, that bent charging handle could have easily cut you or whatever else decided to be in its way. Also, it might be feasible to make a pump-action handle to operate the system. If the new charging handle also flies forward, then you just need to configure a rod to push the unit back and then freely slide back forward. With all the grip space available forward of the trigger, the idea might work.

Edited by SHADOW HUNTER ALPHA, 22 May 2007 - 11:20 PM.

[six-five-two]

It's good... same thing I am using for my SNAP Crossbow, except the slot is going to be facing down and instead of a keyring it's going to be a elbow and CPVC.

[Carbon]

Another thought: with a bit of planning, the stock could be made as removable. Use a small bit of PVC as the spring rtainer, and then add a coupler to that. Then attach the stock normally. The chargerod wil just have to be a bit longer to get past the coupler (or, you could cut down the coupler). Whichever you do, the PVC that is connected to the reducing bushing needs to be screwed down, or the spring will come flying out the back.

[Rambo]

I'm not sure why you'd really want to remove it - it would seem to be too unwieldly to consider a pistol even without the stock. I suppose there's some merit in it, but I don't think it serves much practical purpose.

[Prometheus]

SHADOW HUNTER ALPHA, on May 22 2007, 08:17 PM, said:

Nice work as always, Carbon. Good thing that you managed to remedy that "flying metal" issue. Given more time, that bent charging handle could have easily cut you or whatever else decided to be in its way. Also, it might be feasible to make a pump-action handle to operate the system. If the new charging handle also flies forward, then you just need to configure a rod to push the unit back and then freely slide back forward. With all the grip space available forward of the trigger, the idea might work.

God Damn, beat me to it. This would be a nice pump action, although with it not being a breech loader it probably won't help ROF that much...

[PointBlank]

I love the new look!

[Quilan Fett]

Prometheus, on May 22 2007, 09:42 PM, said:

SHADOW HUNTER ALPHA, on May 22 2007, 08:17 PM, said:

Nice work as always, Carbon. Good thing that you managed to remedy that "flying metal" issue. Given more time, that bent charging handle could have easily cut you or whatever else decided to be in its way. Also, it might be feasible to make a pump-action handle to operate the system. If the new charging handle also flies forward, then you just need to configure a rod to push the unit back and then freely slide back forward. With all the grip space available forward of the trigger, the idea might work.

God Damn, beat me to it. This would be a nice pump action, although with it not being a breech loader it probably won't help ROF that much...

This is a completley feasiable idea that I plan to use once I complete my SNAP.
I will have a 17/32 barrel with 9/16 as a seal inside 1/2'' PVC with a slot in it. 1'' PVC is over the 1/2'' and has a nail goung through the slot and connects to the 17/32 brass. When the 1'' foregrip is pulled back, it pushes the 17/32 brass into the plunger tube and forces the plunger rod to the catch. Then the dart is loaded in the 17/32 barrel via an opening in the PVC. Lastly, the foregrip moves forward and completes the seal.

[The Crackerjack Man]

Any chances of a bolt action gun being made here?

[CaptainSlug]

If you were to link the grip with the rear of the stock using pipe elbows and a matching length of pipe, then make the threaded or solid rod handle long enough to meet up with it, then the ergonomics of this gun could become quite similar to a crossbow.

[Shadow 92]

Nice mod Carbon. I've always wondered though why you don't use 2" PVC for the pressure chamber of all of your later SNAPs. Are there certain design flaws that make the 1.5" ideal or is it just preference?

It's funny that mention a pump action SNAP Prometheus, I'm in the middle of making one.

[Carbon]

It's mostly because the plunger parts I was using started to get pretty hefty...big washers, big parts in general. Since my plunger was heavier, it seemed to negate the advantages of the bigger PC. I was getting the same range I was getting with 1.25" PVC, and 2" used more expensive/harder to find parts. So, smaller parts it is. I saw your big SNAP, Shadow...nice. Be sure to post your ranges when you get some...I was getting around 90', pretty pathetic for 2". A lighter plunger would make it a force to be reckoned with.

Looking forward to seeing pump action SNAPs...you're all describing what I've been wanting to do since I saw Ompa and Bolt's last creations, with the brass breech. I started building one and then...the year happened. I hope to finish one this summer as well.

[Prometheus]

Carbon, on May 24 2007, 04:51 PM, said:

It's mostly because the plunger parts I was using started to get pretty hefty...big washers, big parts in general. Since my plunger was heavier, it seemed to negate the advantages of the bigger PC. I was getting the same range I was getting with 1.25" PVC, and 2" used more expensive/harder to find parts. So, smaller parts it is. I saw your big SNAP, Shadow...nice. Be sure to post your ranges when you get some...I was getting around 90', pretty pathetic for 2". A lighter plunger would make it a force to be reckoned with.

Looking forward to seeing pump action SNAPs...you're all describing what I've been wanting to do since I saw Ompa and Bolt's last creations, with the brass breech. I started building one and then...the year happened. I hope to finish one this summer as well.

Yeah when you get washers that big in diameter (as in to fit inside the 2" PVC), you get them really thick so there is no chance of flex, which results in a larger mass. Therefore, Carbon hit the nail on the head, smaller is better.

[Carbon]

I fixed the chargerod pull to something a bit more usable:


Just two drawer pulls and a dowel hanger...


...so you can charge it with a two-finger wrap.

[Ronster]

Clean your fingernails! Haha jk.

It's nice to see you're still pumpin' out SNAPs. There was a time there where I was scared you'd stopped, but I see I am pleasently wrong.

[Prometheus]

And you could rotate the charge handle so that if someone else was to use it, then they can adjust how they want. Neat-o, it looks good to, and I assume it's ergonomic (somewhat).

[Carbon]

Yeah, this past year was bad for building. Sort of like life was shaking my hand and simultaneously punching me in the gut. But anyway.

Yeah, the stock can be rotated for however you want ot make the pull. It sort of negates the indexed plunger disadvantage that the 2 had: an indexed plunger will concentrate wear on one point, but this one can rotate the chargerod, and spread out the wear a bit.

Okay, this is taking shape now...



New trigger, and a magazine system. Yup, same one from the SNAP-4. Two quick pull motions to charge and load.

Now for cosmetic work...a little bondo, a trigger cover, some superglue, and a paintjob. Definitely bringing this one to the Brookfield war in a few weeks.

[The Crackerjack Man]

I love the "newer" look. Its like a LS in way,and I cant wait to see what it looks like when you finish the cosmetic and paint job.

[Carbon]

Sure.



It's still pretty long, but not unmanageably so.

[Prometheus]

The_Crackerjack_Man, on May 28 2007, 05:51 PM, said:

I love the "newer" look. Its like a LS in way,and I cant wait to see what it looks like when you finish the cosmetic and paint job.

Not seeing any resemblance other than clip, stock and trigger. Anyways, nice work Carbon, it looks like it would be great for outdoor wars, but awkward for indoors.

[Pineapple]

Very nice, Carbon.

I'm moving along pretty nicely with my own SNAP, after responding to Nerfer909 about doing "better" than his little uzi-mini-poop gun. Plunger's done, stock stolen from my 1500 (but might make another one, the plunger nests nicely inside), and going to True Value tomorrow for the spring so I can get a-movin' on this one...



plunger, body, stock and grip (taken from a spotlight that burned out on me.) I know I'll have to make some trimming adjustments, but boy, this puppy blows a lot of air with the current setup (and a weak sprinkler pop-up spring). Barrel looks great but I'll probably go a bit longer. Trigger is still in pieces.

Hope to have this baby stuck together and painted by week's end. The joy of a slow work week.

Sorry to interrupt the thread, but I had to share the good news. Your 1.5 looks mean.



-Piney-