brianthebrains sawnoff riot gun replica

[killagorrila99]

well this is the riot gun replica
good, small gun. not to mention POWERFULL. i had to buy a new end cap caus the bike valve on the last one shot out. needless to say it hurt my friend pretty bad i was just gonna shoot air at him to see if he felt it. ouch. pretty good gun it shot right through 3 layers of ply at 40bar. wow strong steel, or just weak ply anyway youll be hearing more from me.

EDIT: have modded gun and shoots WAY BETTER like 1000 fps. anyway my camera isnt working so heres a diagram. i added a longer chamber and barrel and a piston

[killagorrila99]

o by the way i shoot marbles, double a batteries and cold steel shells and i used it for airsoft once but b4 i could shoot anyone all my friends walked away caus they had crappy plastic spring guns

[killagorrila99]

NOTE: im painting it black on the weekend

[rna_duelers]

Nice cannon,i felt pitty for no one posting..lol..I hate it when people dont post on your cannons,well and ways how far it shoot?

[killagorrila99]

about a kilometre i dunno but it shoots along way

[Brian the brain]

Nice material and I really like the fact you can get it up to 40 bar!!
I've been thinking about copying my own gun but using galvanised steel this time.It'll have to wait till I can afford it.

Why don't you use a piston valve design?? It would really kick butt then!A piston gives you a faster opening.

And if you can get a bigger barrel ( like the 28 mm pipe I use) the gun wil be much more powerful.

[killagorrila99]

hey brian! you are seriously my hero and i think i might make a piston valve gun. but i dont no how to/what to make a piston out of? could u send me an email @ billie_joe_rox945@hotmail.com

[Brian the brain]

This is the basic idea.A piston slides in the pipe connecting the Tee to the ballvalve.The diameter of the piston should be bigger than the barrelport.
Get some neoprene rubber for a piston sealing surface.THe piston can be made out of a bolt, some washers( inside pipe diameter) and some nuts.
To prevent the piston from tumbling, enclose a length of pipe between the washers.

The insides are shown in the dominator thread.It shows the piston made this way.

[killagorrila99]

thankyou brian your awsome but i still dont really get it i mean i no how to make a piston valve gun but not a barrel sealing piston so if u could send me the plans for your riot gun that would be great
ps its my birthday to day and was wondering anyone with spare unwanted spudbucks could sendthem to me. not much just a few

[LucyInTheSky]

Well If you dont under stand barrel sealing valves make a camber sealing one.

[killagorrila99]

mmm true but could someone send me a design idea for a riot gun with a chamber sealing piston? billie_joe_rox945@hotmail.com

[LucyInTheSky]

With that much pressure i would keep the ballvalve (as it is safe) and use a pneumatic ram to actuate it. You can make your own an they can open a ball valve in about 75ms!

[killagorrila99]

wats a pneumatic ram and send me the plans

[zvallance1]

wats a pneumatic ram and send me the plans

i think the term "f'ing google it!" works here...seriously.
a cannon or two on this forum have pnuematic ram on em...
search search search bar!!
=)

[LucyInTheSky]

SEARCH!!! lazy bum.

But anyway here is a gun with a pnumatic ram ball valve on.


And here are plans, your lucy you caught me just after my piston valve started working as im in a good mood.