SpudFiles

First of all, i wasn't quite sure if I should put this in the bb or pneumatics showcase but i ended up putting it in with the pneumatics since its single shot and my primary ammo isn't something round...

This build is the result of peer pressure from jsr
I was urged to build a metal mini pneumatic and so i did... with higher pressures, the difference is insane

Before i saw off the barrel, i want to see what the guns full potential is, so that is the reason for the super long barrel

Specs:

Barrel: 3mm or 1/8in id brass
Chamber: 8mm id copper
Normal operating pressure: 250psi
Primary Ammo: lead shot and lead/tin slugs
Valve: Piston
Trigger: pen cap that presses on the schrader

The Piston:






pointed slug next to my pinky

the power is actually surprisingly great. I shot through 2 coke cans full of water (poor mans chronograph)

Some lead shot after passing through 2 layers of cardboard and hitting a hard wall:


And finally, the video:
[youtube][/youtube]

I Just finished polishing it. The Brass looks 10 times better than the copper which is kinda disappointing because i was hoping it would be the other way around.
It looks MUCH better in person




Well I went ahead and cut my barrel shorter and cut a working sharpie tip off a sharpie and made it removable, ya that's right, it writes now
Luckily, It still has the exact same power.

here it is:




I also started screwing around with it and made a detachable airsoft barrel from a pen tube.
It exceeds any of my expectations. Just got through 2 cans!!

Wow that thing has some balls for a pengun!! How many psi are you able to actually get into it? Peer pressure always seems to get great results!

haha success!

with higher pressures, the difference is insane

See, told you so

Next step, but a shock pump so you can go to the 300-400 psi range

How many psi are you able to actually get into it

i would feel safe taking it to about 350 psi but after that i would start to get nervous.

Peer pressure always seems to get great results

yes yes it does

Next step, but a shock pump so you can go to the 300-400 psi range

ya i was planning on buying one this week. over here they sell shock pumps for like $10 lol. their kinda crappy but should do the job.

Lol that is like identicle to mine even though my chamber is stainless steel Even the damage! Have you tried ball bearings? I shot through 2 cans with one in mine. Good work!

i just finished it today and when i finished i realized how similar it is to yours. the only difference is that my chamber is abit larger than yours. No i havent tried ball bearings because i dont know were to get the right size. Where do you get yours from or do you just hack the bearings to get the balls like i do also 2 empty cans or 2 full?

I got them off a fan chain, they aren't quite 1/8", just a few hundredths short haha but they work good, I have to cut them off the chain. I can get real 1/8" SS bearings at the hardware store though. I got 2 empty cans, haven't tried water filled, but based on the exit wound I'd say it has a chance with water filled cans I'll try it now.

I got them off a fan chain

whats a fan chain
the reason i wanted ball bearings is because their precision made and i can get tonns of them, but i think the best type of ammo ive made so far is a pointed little slug like the one you in the picture except i used a drill-press to drill holes in the back so the pellets fly straight in the air. it actually works because i was sniping cans from across my room and when i missed a few times all the rounds were squashed in the front

a fan chain, thats actually a good idea g f. Or any light with a pull string. You sure come up with some good ones let me tell ya!!

I tested mine against water filled cans, couldnt get through one using 1/8" balls and 250 psi! Tomorrow I'll give it another go with sharpened bullets!

a fan chain, thats actually a good idea g f. Or any light with a pull string.

oh now i get what a fan chain is but dont tose have big gaping holes in the center

Yeah that's why they're no good haha I need to get some real ones.

I need to get some real ones.

dude just use lead shot with a bit of wadding if you can get a hold of some. my woodshop teacher has a whole jar of lead shot for reasons i dont quite understand
oh and holes in the middle of your ammo tend to affect velocity a bit haha

Gun freak- considering our guns are so similar, you should be getting about this amount of power with the right ammo (pointed lead slugs)
http://www.youtube.com/watch?v=JPKvl7mZydA