SpudFiles

I just wanted to comment on my first mini experience. I built a pen sized device out of tent pole Easton aluminum tubing. It is coaxial with a .5" OD chamber and a 27 caliber barrel. At first it had an aluminum piston with a rubber face, but the rubber was too soft. I then rebuilt it with a solid Teflon piston. It now works great at 300-400 psi from a bike shock pump. The fill valve and trigger is a Presta valve. For filling I use a Presta to Schrader adapter.

The parts were turned down on my lathe and assembled with epoxy.

I plan to make one that is more pen like maybe even with a working pen and also one that is longer and more weapon like. I plan to experiment with co2 charging using a bike tire co2 inflater as well.

PeteS wrote:I think it might actually be powerful enough to ************, if I add a laser pointer so I can hit them. If not a longer version might

Discussion of shooting anything at any person and/or animal is prohibited, and may result in a permanent banning of your account.
The exception to this rule is for proper use of legal airsoft and/or paintball markers.

Other than that, photos and videos

jackssmirkingrevenge wrote:

PeteS wrote:I think it might actually be powerful enough to ************, if I add a laser pointer so I can hit them. If not a longer version might

Discussion of shooting anything at any person and/or animal is prohibited, and may result in a permanent banning of your account.
The exception to this rule is for proper use of legal airsoft and/or paintball markers.

Other than that, photos and videos

Sorry. I removed the offending verbiage. I will takes some pics as soon as I get to it.

You need pics if you want my attention.

I just chrono'ed it at 250 fps at 300 psi.
Hopefully the following picture will post.

now im happy, nice pen gun hope you can hit a target with it cuz id like to see it hit a can

Damage photos... Steel bean can entry and exit. Projectile was a 0.5" section of 0.25" stainless rod.

BTW: I am making it more streamlined and adding an actual pen cartridge and point that can be removed when using the gun. Also I made the breech end fit a sharpy cap. All in all it has been a fun project and a good way to get used to my lathe.

Dude, i like your project now you can carry around a pen gun and whenever there is an evil can around you can make sure it is shot, and protect the squirrls (i hate squirrels )

Dart guy, why do you hate squirrels? Nice little creatures that make the nature even more joyable place IMO

Nice pengun btw! Very clean looking

where's the Part in the pen gun where the compressed air gets accumulated to push the projectile out

Talk wrote:where's the Part in the pen gun where the compressed air gets accumulated to push the projectile out

It is coaxial. The tube you see is the air chamber. The smaller diameter and barrel is inside it.

If you look at http://www.spudfiles.com/forums/piston- ... t8157.html it is like the coaxial one except the fill valve and exhaust valve are the same valve.

PeteS wrote:

Talk wrote:where's the Part in the pen gun where the compressed air gets accumulated to push the projectile out

It is coaxial. The tube you see is the air chamber. The smaller diameter and barrel is inside it.

If you look at http://www.spudfiles.com/forums/piston- ... t8157.html it is like the coaxial one except the fill valve and exhaust valve are the same valve.

why use too much lathe works when you can make some simple stuffs to have fun?

My First Mini was something like this ...
almost any kind of ammo was used
I used pomegranate pulp because that had an impact like paint balls
small stones, chewed paper, aluminium foil etc.
put the projectile inside ,stretch the balloon and *pop*

but yes it didn't have the power to Pierce metal cans :3

Talk wrote:why use too much lathe works when you can make some simple stuffs to have fun?

Nothing wrong with simple, but for some of us the lathe work is a big part of the fun.