Soldered Pen Gun

[jor2daje]

After my first successful copper gun, I decided I would give brass a try after I found a source of cheap brass tubing. This is yet another copy of JSR's pen gun with a couple differences; its soldered together, the piston is serviceable and I built a different way of actuating the schrader valve.

The gun is about a 1' 4" made from a 3mm tube and a larger tube I forgot the dimensions of, the piston is the back of a bic pen that I turned down to the right diameter on the drill press. I used a bushing soldered to the chamber to make to piston serviceable.

I decided because this gun holds pressure for a very long time, I wanted to have a trigger system that was attached to the schrader so I didnt have to find an airsoft bb or small rod every time I wanted to fire, so I built a little trigger mechanism that is friction fit onto the schrader and has a bicycle spoke that pushes in the schraders pin.

Only one damage pic for now, I should be getting a compressor that I can take this to over 300 psi with soon, but for now Im stuck at the one eighty my bike pump can do. I was test firing at some cans in my garage, missed and broke a glass sitting on my work bench. It also went through two full soda can lined up, hopefully tomorrow I'll have pics off this and a video. My ammo is small nails.

[Mitchza89]

Job well done on the pen gun mate, she looks fantastic! Always nice seeing penetration too

[theBOOM]

Very nice I like it alot

Very clean build how much range can you get? 8)

Boom

[CpTn_lAw]

Supah nice! Gotta love the metal, huh?

[spudmanb3]

Very nice! the schrader valve actuation is good.

[jackssmirkingrevenge]

You'll be glad with the performance once you take it to higher pressures

The trigger mechanism reminds me of the one I eventially fitted to this project.

[jor2daje]

Just posted a damage pic with my new favorite ammo.

haha ya cptn law I think brass might be my new favorite material to use now.

[frozebyte]

Very nice pen gun, small but powerful enough! What psi do you use and i heard you lose quite a bit of psi when actuating the shrader valve with the spring still inside.(unmodded)

[mark.f]

Looks very good! While it doesn't look very much like a pen, it does shoot very well.

[twizi]

very nice build we should take over norh korea with our pen gun lol

[joepage2008x2]

Hi, my first comment. The pen gun is looking good all you now need to do is make it look like a pen, or put it into a pen. Mine is for a chav deterant.

Ive made a few spud launchers before and recently just made a bb gun that works on pressures at 300psi and over using a homemade solenoid valve. (just search airsoft homemade solenoid valve on youtube)

I have two gun projects on at the moment, a semi-automatic 500psi bb gun, and also a pen gun- only about 110mm long, will look like a pen and shoot 177cal bb`s
Got to get a pump first, the piston seal blew on my last one - was testng gun up to 400psi.
just got to finish making them

[rcman50166]

Hi, my first comment. The pen gun is looking good all you now need to do is make it look like a pen, or put it into a pen. Mine is for a chav deterant.

Ive made a few spud launchers before and recently just made a bb gun that works on pressures at 300psi and over using a homemade solenoid valve. (just search airsoft homemade solenoid valve on youtube)

I have two gun projects on at the moment, a semi-automatic 500psi bb gun, and also a pen gun- only about 110mm long, will look like a pen and shoot 177cal bb`s
Got to get a pump first, the piston seal blew on my last one - was testng gun up to 400psi.
just got to finish making them

Here, if you're going for looks. Here's my pen gun. I think it is the undisputed champion of look-alike-pen-guns on the site.
http://www.spudfiles.com/forums/the-imp ... 14456.html

[joepage2008x2]

looks like i have some competition then, my design pumps up from the barrel because this makes construction easier and also the valve works like a check valve. It will fire anything that is 4.5mm (177cal) although i can make pens with thinner/thicker barrel diameters. It may have a safety so i dont always shoot it in my pocket, i will show how all this works when i post a topic.
Got all of the parts, just got to get an old fridge compressor or get someone to lend me their pump. I will try and set up a chronograph with my computor to measure its velocity with different projectiles including the pen nib.

[jackssmirkingrevenge]

I think it is the undisputed champion of look-alike-pen-guns on the site.

...even if you say so yourself but seriously, I would tend to agree. I wonder if MI5 has any openings?