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The Snap-r

Internal breech-bolt kinda thing

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#1 MercenaryXero

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Posted 20 November 2008 - 11:31 PM

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The goal of this project was to build a reloading system that was both fast and sturdy. After seeing Rork's teaser thread, I got to work.

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The bolt is made from a 14" CPVC barrel with a 1" section of sch 40 1/2" PVC hammered on to the end. I used cut down 3/4" fittings (endcap and plug). The endcap lets 1/2" PVC through and the plug lets CPVC. The Barrel goes through the endcap and the plug, with the PVC anchoring at the back due to the plug having a smaller lip. I used E-tape on the exposed end and put a sheath of sch 20 1/2" PVC. I then reinforced it all with epoxy putty.

The front bushing is a 1"x1/2" reducing bushing with the inside sanded so that the 1/2" PVC moves freely. The rear receiver is half of a 3/4" coupler with E-tape and teflon tape wrapped around it. The SNAP itself is a SNAPbow, in the fact that it uses a +bow spring and a similar plunger head.

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The spring is there because it wasn't cocking securely before.

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Comparison with a BBB.

Ranges haven't been taken, seeing as its dark outside, but is shoots incredibly fast and hard. (I made a point of increasing the resting spring compression)

Questions? Comments? Flames? I don't get this tradition, if someone's gonna tear into you, they will, regardless of your invitation...

Anyway, don't mind me, enjoy.
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#2 cheesypiza001

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Posted 20 November 2008 - 11:39 PM

Nice! I like the internal breech a lot. Can't wait to see ranges.
:)

-Cheesypiza001

Edited by cheesypiza001, 20 November 2008 - 11:40 PM.

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#3 futureseal

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Posted 21 November 2008 - 12:11 AM

Pretty sick! Can't wait for a write-up.
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#4 rork

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Posted 21 November 2008 - 12:14 AM

Mmmm...Pretty. That looks nice. How is the balance?
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<a href="http://nerfhaven.com...howtopic=20296" target="_blank">SNAPbow Mk. V</a>
<a href="http://nerfhaven.com...howtopic=20409" target="_blank">Make it pump-action</a>

#5 Wes7143

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Posted 21 November 2008 - 02:52 PM

You still have to prime the gun and load the gun in two different ways, right? Now if you could just combine the two, then the thing's awesomeness would be two fold!

Any who, great work! I totally wish I did this on my snap before I cemented it up.

-Wes
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#6 rork

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Posted 21 November 2008 - 02:57 PM

That is way more complex than it would seem at first. The priming stroke is longer and in the opposite direction of the breech actuation. It can be done, but not with this design. I may have to make a SNAPbow with a breech like this. Very, very cool.
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<a href="http://nerfhaven.com...howtopic=20296" target="_blank">SNAPbow Mk. V</a>
<a href="http://nerfhaven.com...howtopic=20409" target="_blank">Make it pump-action</a>

#7 MercenaryXero

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Posted 21 November 2008 - 03:44 PM

Pretty sick! Can't wait for a write-up.


Probably won't do a write-up seeing as its only an addition to any SNAP with a 1.25" outer shell, but If anyone wants to build one, I'd be happy to help.

Mmmm...Pretty. That looks nice. How is the balance?


Balance is fine, as long as you don't try to fire it with one hand. ;)
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#8 HugoChillingsworth

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Posted 21 November 2008 - 05:42 PM

I'd like to see some ranges, once you record them of course.
Good job.
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#9 Carbon

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Posted 21 November 2008 - 09:52 PM

This may be the most elegant removable barrel I've ever seen. Nicely done. Does the half 3/4" coupler keep it steady inside the 1.25" shell, or does it have a bit of wobble when you move it back and forth?

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The spring is there because it wasn't cocking securely before.

And I must say, I don't know why I never thought of doing that. If I've had fussy catching, I sometimes keep my finger behind the trigger, but this is a much more consistent solution.
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#10 UpperHand

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Posted 22 November 2008 - 10:02 AM

What kind of paint job (if any) are you giving this monster? Nice work.
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#11 Vulcanman101

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Posted 03 December 2008 - 02:43 PM

Wow nice work man I am hoping to make a similar Snap rifle soon only in my design the breech door is on a hinge. :)
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