new mini

Miniature guns are novelty custom, unique, and sometime downright crude! Common construction materials often include pill bottles or pens. Show us your work!
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urgle the danish cow
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Sun Jan 22, 2012 6:43 pm

i havent made a mini in a very long time and i want to get into pen guns so i thought id start with a prototype.

main tube 1/2 inch copper.
caliber 6mm
piston machined nylon
valve schrader
pressure 250psi

it works pretty well and sends bbs flying rather nicely. i used jsr's method of using a drill bit to keep the barrel centered while the epoxy cured. i hope to make a few brass pen guns with lighter machined nylon pistons
thanks
Attachments
piston
piston
with spring and in valve
with spring and in valve
nail head for trigger
nail head for trigger
before epoxy and trigger mechanism<br />note that the little &amp;quot;tail&amp;quot; on the back of the piston was cut off and the back was hollowed out with a drill
before epoxy and trigger mechanism
note that the little &quot;tail&quot; on the back of the piston was cut off and the back was hollowed out with a drill
gun
gun
gun with pump
gun with pump
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Gun Freak
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Sun Jan 22, 2012 7:02 pm

Made use of my trigger idea, I see ;)

Looks good for a concept, I'm sure you can do a lot better.
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jackssmirkingrevenge
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Mon Jan 23, 2012 1:29 am

Not a bad effort, did you put any rubber seals on the piston or is it just nylon against metal?
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pneumaticcannons
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Mon Jan 23, 2012 8:04 am

Nice effort :) though it looks like you could trim that excess epoxy off and the copper itself is begging to be polished. Does the nylon seal leak at all?
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urgle the danish cow
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Mon Jan 23, 2012 5:46 pm

jackssmirkingrevenge wrote:Not a bad effort, did you put any rubber seals on the piston or is it just nylon against metal?
its just the nylon and is leak free as i smoothed out the back of the barrel for a perfect fit.
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urgle the danish cow
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Mon Jan 23, 2012 5:46 pm

pneumaticcannons wrote:Nice effort :) though it looks like you could trim that excess epoxy off and the copper itself is begging to be polished. Does the nylon seal leak at all?
yeah i would do that but its just a protoype for smaller penguns. btw what is the best way to polish the copper?
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Gun Freak
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Mon Jan 23, 2012 6:43 pm

You can use fine grit sandpaper...
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