Or someone in the US could order it for me, then send it to me and I'd send them the money. Any volunteers? Pretty please?

Oh that sucks. I just got this email: Thank you for your order. Unfortunately, due to the ever increasing complexity of United States export regulations, McMaster-Carr will only process orders from a few long-established customers in Canada. We sincerely regret any inconvenience this causes you. Tha...

Timmins Ontario. I'll send you a link to the newspaper story if it somehow managed to excessively hurt someone. I'm waiting for the ABS to dry and I'll test it out in the morning.

I've played paintball every single weekend for the past 3 summers. I play with a large group of friends at an abandoned mine, and every person I play with thinks these grenades are a cool idea. I wouldn't fire one if someone was uncomfortable with the idea. The nail won't be pointed outwards. It has...

I'm on McMaster's site now and I don't see one in sch40 PVC. It doesn't make sense to me that it wouldn't be made, its just a matter of finding where I can get it. If you have a link that would be great. I'm not firing actual paint grenades at people because yeah, that would be really dangerous. I m...

I just got back from a plumbing whole saler. I have a piece of 2 1/2" sch40 pvc, and the 3" pipe, but apparently they don't make a coupling to go between the two. I mean I can't even get one special ordered because it isn't something that is manufactured. I'm using a co-ax design to save space, but ...

I'm making a grenade launcher for playing paintball. I need to use a 2 1/2" barrel to fit the grenades I've made. The problem is that the compressed air tank I use to run my gun is regulated to around 800-850psi, and 2 1/2" steel sch40 pipe isn't commonly used for anything, so I would have to specia...

Really nice gun, but for future reference when you are gluing ABS together, once the pieces have been put in place, you can wipe the excess glue off with a paper towel or something. You get a much cleaner look, although I think your gun looks great.

I have a gun that I made before I knew anything about C:B ratios. It is a 2" chamber around 2' long, with a 1" barrel around 2' long. I can get a huge flame out of it using hairspray.

I'm never gonna take it over a 1x mix, so I figure I should be alright. I've got a couple other combustion guns made from DWV ABS and I've put hundreds of rounds through them with no problems.

Well I'm not sure if it will work. I'm hoping it will, but the pressure generated could be a big problem. I'm trying to get around this by having everything well lubed and having as many things driven electronically as possible. The only real difficult thing to move is the breech cover. I guess the ...

I'm almost finished building it. Give me a few minutes to upload the pictures.

Alright I'm almost finished my full auto gun. I'm putting this in the hybrid section because it is technically a hybrid, although I don't plan on ever taking it past a 1x mix. http://img204.imageshack.us/img204/9346/golfballgun2qb5.png It will be firing either golf balls, or if I don't feel like spe...

The pressure rating would depend on how big and what kind you got. I'm sure there are hydraulic rams that you could completely fill with C-4 and not worry about having it blow up.

DISCLAIMER: That was just an example. C-4 should not be your primary method of pressure testing a chamber.

With a heavy gun the recoil would be less. It is the weight of the ammo that affects recoil. If the gun is really heavy, that means there is more mass that needs to be pushed backwards, so it wouldn't move as fast. I think a hydraulic cylinder is a great idea because it is already pressure rated. Th...