Page 1 of 1

4mm Marker Gun v2

Posted: Thu Sep 15, 2011 3:58 am
by pneumaticcannons
This deserved a new thread :)

So basically this one is similar to v1 except it uses a different type of piston and i made it with out that ugly outer barrel that i had on v1. its also a bit more powerful :twisted:

Specs:

Main valve: Hot glue piston with a Nerf dart tip as the sealing face (screwed it on)
pilot: schrader
barrel: 4mm (unfortunately plastic :? )
chamber: crayola marker
firing pressure: yes, again, 150 psi :twisted:

Here it is:
Image

without it's disguise:
Image

Image

the screw holding the nerf tip to the piston:
Image

It also serves as a tiny nerf gun :)
[youtube][/youtube]

Shooting an iphone :lol:
[youtube][/youtube]

That shot was made 5 mins after filling. As you can see it has NO leaks

It passed the idiot fooling test (i asked my friend if it looked like a marker) I was trying to make it look like one of those double sided markers (yes they do exist) and it turned out pretty good.

I was very surprised at the result of this test:
[youtube][/youtube]

Is this the smallest shotgun round ever???!!! :lol:
Image

proper fps testing to come... :

Posted: Thu Sep 15, 2011 4:52 am
by daniel0663
firing pressure: yes, again, 150 psi
...... you must be kidding right? :lol:

besides from that, looks like a normal marker with a barrel sticking out..
makes me wanna finish off my coaxial, which was a failure.

Posted: Thu Sep 15, 2011 7:00 am
by pneumaticcannons
hahahha ya thats what everyone says. dont get down if your co-ax doesn't work on your first try. This is actually a v3. the first was a total failure, the second worked fairly well and it wasn't until this one that i got it just right. good luck!

Posted: Thu Sep 15, 2011 1:23 pm
by cammyd32
That much power within a crayola marker case?! that's insane! I love concealed guns, especially penguns like this. great job, and love the ammo :D

Posted: Thu Sep 15, 2011 2:26 pm
by pneumaticcannons
cammyd32- thanks, i was really surprised at the can full of water test also.

Posted: Thu Sep 15, 2011 11:28 pm
by jackssmirkingrevenge
Good job, but you should really consider stronger construction and use of a shock pump, the difference in power will be a revelation.

Posted: Sat Sep 17, 2011 1:24 am
by pneumaticcannons
jackssmirkingrevenge wrote:Good job, but you should really consider stronger construction and use of a shock pump, the difference in power will be a revelation.
remember, I live in thailand and it's extremely hard to find anything pvc, copper, or steel here. (actually i lied about the pvc but non of it is rated :( ) higher pressures would be great though. My wood shop teacher does have some small id copper which would be great for a hp pen gun...

Posted: Sat Sep 17, 2011 1:46 am
by jackssmirkingrevenge
pneumaticcannons wrote:I live in thailand and it's extremely hard to find anything pvc, copper, or steel here.
You don't need any of those, all you need is brass and epoxy ;)

Posted: Sat Sep 17, 2011 7:34 am
by pneumaticcannons
all you need is brass and epoxy
okay you've convinced me, i might as well give it a go (I got lots of free time :o )