at toys r us if they have it or a toy store. nerf guns arent exactly high powered though
http://www.wikianswers.com/Q/Where_can_you_find_high_po...
There are no such devices which can shoot all 3 of the different projectiles you mention (Airsoft, BB or Pellet) at those velocities. However, if you are willing to come down on velocity, there are a number of Airsoft guns that will get you...
http://answers.yahoo.com/question/index?qid=20081028152...
In this video tutorial, you will learn how to make a high-powered stun gun out of easily obtained supplies. This easy to find materials would be some wire strippers, some wire, needle nose pliers, rubber gloves, a knife, scissors, a screwdr...
http://www.wonderhowto.com/related/make-a-_22_taser--to...
B 2:12 Watch this weapons video tutorial on how to make a simple homemade high-powered slingshot gun. This is a step-by-step guide on how to make an incredibly hi-powered gun or slingshot or airsoft gun. All you need is scissors, a balloon,...
http://www.wonderhowto.com/how-to/video/how-to-make-a-s...
You can, but, the question is should you and does it violate any local laws.
http://wiki.answers.com/Q/Can_you_fire_a_high_power_pel...
Ok, so this is a difficult question to answer. So I'm gonna use this simple diagram I made in paint and a huge wall of text to help you out. In the first image (marked by a 1) you see why iron sights dont work with knex. You will need a ver...
http://www.instructables.com/answers/Do-sights-for-high...
Not unless you like potato shrapnel. I don't recommend you to use a high-powered fuel. After all, the potato gun is made of plastic. If you have a potato gun made of metal then that's a different story. Even if it is made of metal I still r...
http://neumanspotatoguns.tripod.com/id1.html