this is the link to the pic of my BB zipgun MK4, thanks to Rat_Bastard...
http://krimzonpyro.com/various/mk4.jpg

info:
caliber: 6mm BB
ammunition: 6 X 25 mm BB (shown in pic)
muzzle energy: 2.4 joules
range: 10 metre (accurate)
capacity: 1 round
TKO: 0.04
[(.24inc X 1.852grain X 656fps)/7000]



[This message has been edited by gun-nut (edited 01-28-2003).]

that's pretty cool. if the cops found you with it would they cut your hand off or something?

Well im pretty sure like 650fps is a lethal velocity so if the cops saw you with it, id say run or...well, just run. I thought it was interesting how u made the trigger out of a nerf dart. I think I might try to make something like that. By the way, does the supressor really work? Cuz I made a mock up supressor for my airsoft and it didnt work very well at all :\

Edit: What kind of tape is that and what did u make the grips from? Well, cheers.

[This message has been edited by cola (edited 01-29-2003).]

the trigger is not nerf dart...
it is 2 small rod and a short small rod
laying out a T shape, then the trigger part is taped...

the supressor can reduce the sound by half +
due to the smaller chamber in this slim design...
the past designs are more effective, but
more bulky...
and causes a weight which bent the barrel...

the grip is duct tape...
the smaller gun is duct taped all over...
the larger one is taped with those wire tapes...

the barrel, featured in the pic is covered
by duct tape, but not effective...
they cracked in 1 shot

i used composite layer of wire tape and
transparent tape to reinforce the barrel
(cos it is better and less tendancy to crack)


the police might not care and might laugh at it...
cos it is so small and toy-look they might thought it is a homemade toy or pea shooter...

if you want to avoid getting caught by police,
use pink and other toy colors...
the police might take that as a toy dart gun
...

unless you fire it, it looks like a toy,
weigh like a toy....
so ppl might laugh at it until they got
shot by the gun...
it sounds like a cap gun when supressed
with this supressors...

and sound like a striking match when using
a large chamber supressor...

and sound like a paper bag pops with a
medium supressor...

but the MK4 is not meant to be supressed...
the exposed barrel causes sound to escape..
the supressors are not really effective on this one


[This message has been edited by gun-nut (edited 01-29-2003).]

also, the supressors are actually design taken from REAL SUPRESSORS and modified
to be built with the avaliable materials...
and the low level of precision i can work on
....

also, im currently designing a blow-back
or delayed blow-back design...
but that might takes 1 or 2 more designs
to be perfected...

that should be a 'toy gun' which
pops 8 to 10 BBs at 656fps as fast as you can trigger...


[This message has been edited by gun-nut (edited 01-29-2003).]

����I don't think you'd have enough power in a party popper to facilitate a blowback design. It's questionable enough that those things are actually throwing BB's 650 feet per second.
����I would change the design slightly to narrow the barrel and use .177 metal BB's, personally, but those may not be available where you live.

~Zero

the BBs are very light, thus reaching that
speed is possible...
but the loss in fps is very dramatic...
the BB slow down greatly at range...
the light weight retains little momentum...

i tried .20 cal (5mm) wax balls...
they travel faster, but the fps loss is greater...

so if you are around 20 metres, the BB might have slow down to the speed of a normal
spring pistol, maybe lesser due to wind...

you might not be able to accelerete the .177
fast enough if they are made of metals...

see KE = 1/2 M X V^2

the increase in mass will be decrease in velocity, thus the energy is still same...
a heavier BB can retain it's fps at range,
but it would be moving much slower than
a lighter BB...

if i want range power, i have my own rubber band gun...
it shoots a wooden dart heavier than BB
at a slower speed...
but it can be accurate up to 40+ metres...

the smaller cross section area bring less
air-resistance, and thus fps loss is minimal

i once tried taping a long reinforced cartriage to a MK2 with 5mm ball loaded...
the green bead of the cartriage was blown
out despite the heavy taping...
the bead alone is as good as a spring pistol's BB...

MK3 and MK4 was added with a breach stopper
(red thingy) to prevent the cartriage from getting blown out...

so i only need a breech stopper with enough
power to hold the round until it was fired...
(the string was pulled)

but the stopper isnt strong enough to hold
the blast and the cartriage get blown out
from the back...with the stopper....

[This message has been edited by gun-nut (edited 01-29-2003).]

650 feet per second is very fast and powerful. 250 feet per second faster than my P-23(which is co2 powered!). I really got to build one. I might sound stupid, but do you have any plans or step by step, becuase i keep reading all these topics and posts about them, but i dont get any actual instructions.

Yea I would be interested in making one also. Maybe making a few altercations to it. How does a pump-action shotgun sound? lol.

i have sent Rat_Bastard a cross-section plan of a loaded MK4...

as well as the cartriage...

pump action is ok, but the problem lies with
the cartriage...

you need to pull a string from it instead of
hitting the primer with a hammer...

yea yea. I noticed that. Its just..how would you get past the primer? Maybe instead of pulling it, you should have a pin or hammer that slams it very hard. That oughta do the trick.

Got it. http://www.krimzonpyro.com/various/

http://www.krimzonpyro.com/various/mk4-with-cartriage.gif

the pic directly for anyone who is lazy to
look for it...

im thinking of firing the round
by using a short pin to poke the fuse...
the string will be cutted off and
a pin is put in place...

and a hammer or sort slam on the pin and fire the round...

but keeping the fuse in place is the problem
cos if not the fuse will move with and pin
and cant be set off...

I had a strike of genious in school today. I went to a party store and bought a party popper gun and an additional set of rounds. They are all self contained but have a really low power (like .20 gram). What my idea was is to take maybe a firecrack's powder and fill up some of it. Either use that or the powder from the other party popper (around 1.8 gram). Just dump the powder into the cartridge and it should work.

Note: Using firecrackers BP might blow the gun up. It's not advised that you listen to me. Cheers!

flash powder is usually used in firecrackers, but some might have BP. I might start designing a semi-automatic gun with this design. It would probably function like an old fasioned rifle, there that bolt was on the side, and you pushed up, back and forward. I forgot the name of it.

whats the deal with all this bullshit .20 gram stuff? I bought some regular party poppers and they only had .20 too. Fuckin michigan.

.2 gram isnt that little. It is about 4 times as much powder that a regular blackcat. Hmm, i might experiment with using blackcats as the propellant. It isnt much, but it will sound more realy than what i have now, and it will still penetrate the human body from a couple of feet away.

My bad. It's .20 grain. Not gram. I made myself a 1 shot pistol with it. Doesn't shoot nearly 650 fps. More like 280-300. It's alright I guess. I was at my buddys house with this other guy, and he shot the cat with it. Didn't go in, but probably still hurt like a bitch. Pooor kitty...

.2 grain is low, 1/5 the amount in a blackcat. If you could find one, a blackcat could probably propel a metal bb about 400-500 feet per second. I was thinking of using only a blackcat and not projectile, becuase the endplugs on the blackcats are really hard, and it could be run shooting something.

what is the name of the party popper gun ?
how does it looks like ?

is it those guns which load the confitini
like shotgun shell and shoot using a cap ?

the manual operated 'forward and backward'
is called "bolt-action"

you can have single shot breech loader
as well as box magazine loader
for bolt action....

im also designing a single shot loader
currently...

the BB once went 1 inch deep into a lobster's
head...despite the hard shell

i used a 4 inch barrel for that...
the shot was fired 30cm away from the head

it was fired by a MK1, maybe have lower power
due to earlier designs...
about 500 to 600 fps ....

a 'magnum' barrel is 6 inch long...
it packs the BB with more power and higher fps, maybe 680 or 690...even 700...

How much did the good party poppers cost each? The ones I got were chinese and cost like 19 cents a piece.

mine ware those china party popper...
it is kept in a red box with a blue
santa's pic

it reads: "FIREWORKS UN0336"
made in Hunan. China

72 a pack, costs around 5 to 7 dollars
(singapore dollars)

US$ is double of S$
1 US$ = 2 S$

im currently researching the cartriage
which can be fired by a hammer...

and designing a system which can be fitted
into a AR-15 chasis...
it is estimated to look like a M4 carbine

and fires stringless cartriage...
having a 3 to 5 round clip

main firing component is made from
light weight materials to see if a blow-back
can be done

and the handguards are made from
glued newspaper and taped at the outside
the other parts are made from cardboards
...

but i will build a single shot pistol MK5
to see if the stringless round works well...

the AR-15 design is still on the paper, and
might not be very sucessful...
but if suceeded, it will be cool...


[This message has been edited by gun-nut (edited 02-02-2003).]

How many grains were in each one? On the back of mine, it says like "Safe for kids! Only .20 grain!" or some stupid shit like that.

i dont really have a idea, there is nothing
mentioning the dosage of explosive...

but i once wetted and open up the fuse...
it contains around 3 to 4 cap's powder...

I bet they had to 'Americanise' the stuff for the soccer bitches over here. So I guess I should use like 4 charges to make it go around 600 fps.