Me and a couple of friends go free running once a week. Having a gym to train in is very helpful for learning new things in a safe environment.

I don't see much advantage to having two barrels as opposed to one large one. Unless you are shooting a specialized ammo that requires two barrels. The barrels would have to be very well aligned for the two projectiles to stay at the same distance. The more practical way to shoot multiple projectile...

Nice. I wanted to build one of these and went around to my local hardware stores asking if they carried surgical tubing. I guess they thoughti was a heroin junlie or something because they kept giving me weird looks.

I've seen instructions for these on instructables.com and unitednuclear.com, but have read that a different mixture is used to create colored smoke like in the picture.

Could I use epoxy gel instead of marine epoxy. I used it for modding my last sprinkler valve and it has a very high viscocity.

My stepbrother... it's all his fault

There is also a gay version of Powerthirst. It is funny ecept there are lots of pics of guys in speedos ect..

MANANNA!! My freind showed me these videos a while ago and I couldn't stop laughing.

no idea how to get your mom back. that's pretty funny tho

I watched the passion of the christ on friday. It was pretty brutal. I

I just saw on the news how a girl was found dead in a park with a blood alcohol level of 0.5. I live in the middle of nowhere, CA and most high school kids have nothing better to do and end up getting in tons of trouble.

I just learned that mmHg, torr and atm are also used as pressure measurements from my chemistry book. There was no mention of psi. I don't see why we need 5 different pressure measurements. it just makes me confused.

A solution to air leaking around the bolt would be to have a plunger type thing fixed to the bolt so that it would seal when cocked back.

I was going to keep this valve under wraps untill I could build a cannon with it but with the loss of a place to shoot, (I moved from the country into the suburbs) I will post it up here and hope someone can make use of it. The main idea is a breech loading cannon with a burst disk valve. every time...

I got the same problem the first time I installed it. I tried again a few months later and got it working but now it doesn't work. again. I get the "missing file" message too.

ouch. I have two humongus blisters on my left thumb and forefinger from a heated knife blade that i was using to cut wax with. I thought it was sufficently cooled so I went to wipe the wax off with a paper towel and it burned right through. My parents dont really care too much but your incident soun...