SpudFiles

My MB1, or Marble Blaster 1.

My first spud gun. It is a pneumatic piston gun, with easy changeble barrel (within 10 sec's). The mounted barrel is breech loaded. It uses reloadable shells. It has a chamber of 1" to 50 cm. The pilote valve is triggered by a ball valve. A pistol grip is welded to the lower side, so the ball valve can be pulled open easily. The barrel has a fortification above the breech, looking like the handle of a M16.

Due to the fact I have a compressor with a max of 7 bar (100 psi), I just shot the gun several times of a thin wooden plate. The marbles went trough. That was a nice feeling (youi know what I am talking about.)

I realy need to buy a high pressure pump, or make one.

Anyway, here some pics of the gun :

The MB1 in all it's glory :
[albumimg]220[/albumimg]

Me holding the gun, just to give you an idea how big it is. (BTW, I am 6ft20, not 3 ft )
[albumimg]221[/albumimg]

Changeble barrel pic :
[albumimg]225[/albumimg]

Damage pics :
[albumimg]224[/albumimg]

These are the shells I use :
[albumimg]222[/albumimg]

And again :
[albumimg]223[/albumimg]

Pic of the shell, right one, a cheap one, made mostly out of PVC, to the right, a full copper shell :
[albumimg]226[/albumimg]

Pic of the breach with shell in it:
[albumimg]227[/albumimg]

I am gonne add a self made bipod, which is mounted on my .177 air rifle for the moment. I also am gonne add a sight (probably a scope, got one lying around here)

So guys, what do you think about this first gun ?

Very interesting set up, I guess you could call it over under and upsidedown.
Great job for your first spudgun, great job as it is. That is quite a big cannon although it looks small. Your breech is inovative. You should enter this in the spudgun build off.

*you will get much better quality images if you upload them straight from your pc. Just resize them, they can't be more than 50kb.

POS wrote:BTW, I am 6ft20, not 3 ft

You must be pretty tall.

Nice gun, I like the shell idea.

Damn I forgot, I made a silencer to :

woah thats a pretty sweet gun.nice, you should enter it in the spudgun competition

wow, 6 foot 20 ? so it's a ballvalve gun, or is it a piston gun? very nice breach system.

It looks to be a piston.

Very Nice Gun!

schmanman wrote:wow, 6 foot 20 ? so it's a ballvalve gun, or is it a piston gun? very nice breach system.

6.2 is the same as 6.20 and 6.200000 Whatever.

a ballvalve gun ? Can't you tell what kind of a gun it is, by looking at it ? It sure is a piston valve gun. What do you think I am ? A newby ? (well I am conserning spud guns, but you get the point ... )

I guess, not that I have been shoting it, that the space between the piston valve and the place where the ammo sits in the barrel is to big. I guess the ammo should be right next to the valve. Now a lot of pressure is getting lost in the "unused part" of the barrel, behind the breech.

The gun shoort nicely, but not very powerfull. In a straight shot, holdting the gun at 1.5 m from the ground horizontly, is "only" covers 50 yards without hitting the ground. I think that is very poor. It should at lease cover 100 yards horizontly.

Now, I just have a pressure of 7 bar max (100 psi). A gavla chamber with copper parts should at least hold 200 psi, isn't it ? Guess I have to buy me a high pressure foot pump or something.

Oh, and something else I found out. There is no or little point to use a silencer, if you don't silence the exhaust of the pilote valve as well, that gives a pretty loud bang to.

MrCrowley wrote:woah thats a pretty sweet gun.nice, you should enter it in the spudgun competition

What competition ?

Here you go: http://www.spudfiles.com/forums/viewtopic.php?t=2746&
It was in the announcements. A lot of us are entering, so should you.

Unique design... I like it!

You should maybe try compacting the elbow assembly to reduce dead volume.

i dont see any pics

beebs111 wrote:i dont see any pics

Look here then, now, 29.09.2006 at 12.30 CET the last 8 pics are mine. I hope you can see these ?

Cool gun,pics are a bit small.Very nice first gun.I love the metal guns and the high pressures you can take them to and only running it at 7bar,wai till you go to 14-12 bar those projectiles will really fly!And im 6'1" woot!

You might wanna go here: http://www.pneumatiekshop.nl/producten/ ... htm#anker1

You can order them from Holland can't you?

Thanks BTB, intresting site. It is not clear though, what triggers the valve. You know that ?