If it's copper it should be, but I'm not sure.
If its PVC be careful about what lubricant you use I think some petroleum products can weaken PVC.

Whether you're firing a potato or a paintball gun, it is illegal to use solid propellants in a homemade gun unless you register it as a firearm. Try to avoid discussing illegal topics.

I must admit that video is pretty cool.

3. Discussion of solid propellants, explosive devices or incendiary projectiles fired specifically from a spud cannon is prohibited, and may result in a permanent banning of your account.For the purpose of this forum, these definitions will be used: 1. Solid propellant: Any substance containing all...

What do you want the solenoid to do that it doesn't already do?

can i hook up a blow gun to this? i have one already i just wanted to know. http://www.homedepot.com/webapp/wcs/stores/servlet/ProductDisplay?storeId=10051&langId=-1&catalogId=10053&productId=100348465&N=10000003+90401&marketID=401&locStoreNum=8125 No you can't hook a blow gun up to that long strin...

And they all require you to buy a nail gun with the compresor?

Just so you know, I lol'ed IRL. :lol: I'm not a big fan of Mac's, I just checked Opera's site and they have a windows version too, I've always sorta associated Opera with Macintosh, you said in a later post that you use IE so I guess it didn't really apply. I also suggest Firefox, I've been using i...

The forum works quickly for me. A general rule of thumb when dealing with computers is that if it isn't working, carefully check the outer case of your computer, if you find any weird markings that looks like some sort of an apple your problem is obvious. Unfortunately to fix this problem you have t...

If you plan on using it for paintball, don't mention it, you're just going to get the thread locked.

Are there any other hardware stores around?

You are probably putting too much butane in your chamber for ignition. Combustion requires a lot of air, try putting less butane in your chamber and venting in between shots.

Every air regulator I have personally seen dumps excess pressure into the atmosphere, this is safe for air because it's not explosive. I personally don't think standing in a cloud of air and propane while firing a combustion cannon sounds like my idea of a good time. I know there are some non-reliev...

I think he wants something for a BBMG seeing as he posted in the BBMG section. A PVC tank is possible, but considering the intended use, I would not recommend it. CO2 is possible too, but it would get expensive. Even a 5-gallon air tank would get drained quickly by a BBMG. I recommend you buy an air...

I'm not sure what pressure you think "real" regulators operate at, but they generally are fixed at 20 psi. I've seen high pressure regulators online (mostly 30 psi, a select few go as high as 60 psi), but they cost quite a bit more than $18, especially ones with adjustable output. A 0-60 psi adjusta...

Oh weird, He wrote right into the middle of the quote... I didn't read it carefully enough lol.

Edit: Btw hay is for horses.