Deathray Marble Machine Gun

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.

Have I finally topped the sawed-off

Yes!!!
23
50%
well...YES!!
18
39%
I don´t like full auto guns that can shoot through guitars
5
11%
 
Total votes: 46
User avatar
pizlo
Corporal 3
Corporal 3
Posts: 783
Joined: Fri Dec 22, 2006 7:27 pm
Contact:

Mon Mar 17, 2008 1:53 pm

POLAND_SPUD wrote:pizlo... what do you mean?
you told that as if there were dozens of semiautos on spudfiles... :D
Ahh yes, but any gun with a fast enough compressor is a gravity feed clip can be semmi. And even then semis are also few and far between, but there are more of them then there are full autos(excluding bbmg)
User avatar
POLAND_SPUD
Captain
Captain
Posts: 5402
Joined: Sat Oct 13, 2007 4:43 pm
Been thanked: 1 time

Mon Mar 17, 2008 10:43 pm

but is there even one relatively powerful semiauto gun here ?? name one...

don't forget that you can build a marble fed fullauto cloud or vortex without any problem...

I think that BtB has the possibility to convert his gun to semiauto.... this way he could post some vids while he is still working on full auto version and that valve of his design...
User avatar
Brian the brain
Moderator
Moderator
Netherlands
Posts: 3496
Joined: Mon Dec 05, 2005 2:06 am
Location: Holland
Been thanked: 3 times

Tue Mar 18, 2008 3:36 pm

Well...version 3 of the snapvalve failed...And I'm done trying the full auto piston thing.

I'm not giving up on full auto though.
I'm gonna go with what I know works.I will use the first MMG I made as an example.I will shorten the rise tube it had and I will have more flow and MUCH more pressure this time, and smaller, uniform .50 lead ammo.

The first one worked reasonable well, but was a bit bulky and just not powerful enough.

So instead of trying to build something new, it makes more sense to build what worked in the first place, but this time with all the stuff that one should have had..

Boy...I'm not making sense am I?
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!!
User avatar
Mitchza89
Sergeant
Sergeant
Posts: 1056
Joined: Tue Jan 09, 2007 12:05 am

Wed Mar 19, 2008 9:03 am

One of the many perils of spudguns. I've never made a piston gun that I've been totally happy with....Something always gives way or breaks after a couple of days of heavy shooting... Making the pump and discovering high pressures just makes things shit themselves even faster.... But I am using small bore after all.... Anything over 12mm is a bit easier to work with :D

Best of luck with the build mate.

Curious... I've always been wondering on where the hell you got that ball valve you used for ya riot gun....It's very, very odd...
Image
User avatar
STHORNE
Sergeant 3
Sergeant 3
Posts: 1208
Joined: Wed Feb 14, 2007 7:50 pm
Location: Kewaunee, Wisconsin

Donating Members

Wed Mar 19, 2008 9:17 am

wow this is an old thread lol. still going on though i see.
Forum Rules - follow them or else!
“Happiness is the meaning and the purpose of life, the whole aim and end of human existence”
User avatar
Brian the brain
Moderator
Moderator
Netherlands
Posts: 3496
Joined: Mon Dec 05, 2005 2:06 am
Location: Holland
Been thanked: 3 times

Thu Mar 20, 2008 2:56 pm

Curious... I've always been wondering on where the hell you got that ball valve you used for ya riot gun....It's very, very odd...
I got it at a store... :lol:

It is a brass compression fitting-BV commonly used around fire hoses in buildings in my country.
They came in handy to connect all sorts of stuff while the main "system remained the same.
I can get a lot of odd stuff, not all, but some of those things are quite usefull for spudding.
The great thing is, I don;t need BV's like that any more now I can pretty much tap every thing myself.

I have a design in mind for the revived-and-improved MMG.I have finished the rise tube and ammo feed set up and the pressure lines to power it.
Notice I did not say barrel...

That..will have to wait until I got permission from the pregnant boss :D
She somehow feels it's not a priority..
Women :roll:
Anyway..that will not be a problem, just need to get some ( common around here) 15 mm copper.
The principle is to have the ammo follow the constant airstream, not unlike a cloud.
The difference will be the pressure used ( 40 bar) and improved flow.
I believe the Girandoni rifle already prooved what 40 bar behind a big lead ball can do over two centuries ago.
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!!
User avatar
scottcrete
Specialist 3
Specialist 3
Posts: 332
Joined: Tue Mar 18, 2008 1:26 am
Location: Bridgeport, West Virginia USA

Fri Mar 28, 2008 7:34 am

very nice.. great job.. lets see a video of you pounding a water jug. (not a girls boob either) a real jug
User avatar
Brian the brain
Moderator
Moderator
Netherlands
Posts: 3496
Joined: Mon Dec 05, 2005 2:06 am
Location: Holland
Been thanked: 3 times

Fri Mar 28, 2008 1:13 pm

It didn't work very well.I had to pump the trigger to get it to work and got 1 shot every 2 seconds.
THey were powerfull shots nonetheless, but not what I was after.

I continued the deathray-series with an "airsoft"-machine pistol-strafer at 500-900 psi.
Pretty scary result....

Check out the Deathray MP thread
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!!
Post Reply