MB1

Show us your pneumatic spud gun! Discuss pneumatic (compressed gas) powered potato guns and related accessories. Valve types, actuation, pipe, materials, fittings, compressors, safety, gas choices, and more.
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POS
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Thu Sep 28, 2006 1:41 pm

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 :wink: (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 :wink: )
[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 ?
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)DEMON(
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Thu Sep 28, 2006 1:52 pm

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. :D

*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.
Last edited by )DEMON( on Thu Sep 28, 2006 2:00 pm, edited 1 time in total.
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Thu Sep 28, 2006 1:55 pm

POS wrote:BTW, I am 6ft20, not 3 ft :wink:
You must be pretty tall.

Nice gun, I like the shell idea.
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POS
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Thu Sep 28, 2006 4:08 pm

Damn I forgot, I made a silencer to :
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This is the silencer, lying undher the drill. Forgot to take a pic of it. That's for tomorrow, but here already the silencer itself. It's aprox 1 feet long and 2" thick, filled with steel wool. Works pretty well
This is the silencer, lying undher the drill. Forgot to take a pic of it. That's for tomorrow, but here already the silencer itself. It's aprox 1 feet long and 2" thick, filled with steel wool. Works pretty well
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MrCrowley
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Thu Sep 28, 2006 4:15 pm

woah thats a pretty sweet gun.nice, you should enter it in the spudgun competition :twisted:
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schmanman
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Thu Sep 28, 2006 5:25 pm

wow, 6 foot 20 ? so it's a ballvalve gun, or is it a piston gun? very nice breach system. :D
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SpudStuff
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Thu Sep 28, 2006 6:03 pm

It looks to be a piston.

Very Nice Gun!
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POS
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Fri Sep 29, 2006 1:54 am

schmanman wrote:wow, 6 foot 20 ? so it's a ballvalve gun, or is it a piston gun? very nice breach system. :D
6.2 is the same as 6.20 and 6.200000 :wink: Whatever.

a ballvalve gun ? Can't you tell what kind of a gun it is, by looking at it :wink: ? 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. :cry:

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 :twisted:
What competition ?
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)DEMON(
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Fri Sep 29, 2006 2:00 am

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.
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mark.f
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Fri Sep 29, 2006 5:31 am

Unique design... I like it!

You should maybe try compacting the elbow assembly to reduce dead volume.
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beebs111
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Fri Sep 29, 2006 5:39 am

i dont see any pics :(
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POS
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Fri Sep 29, 2006 6:13 am

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 ?
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rna_duelers
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Fri Sep 29, 2006 7:21 am

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!
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Brian the brain
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Fri Sep 29, 2006 12:19 pm

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

You can order them from Holland can't you?
Gun Freak wrote:
Oh my friggin god stop being so awesome, that thing is pure kick ass. Most innovative and creative pneumatic that the files have ever come by!

Can't ask for a better compliment!!
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POS
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Fri Sep 29, 2006 5:05 pm

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