US Army Selects Top Inventions That Can Take, Or Save, Your Life

IEDs, or Improvised Explosive Devices, are a sad fact of war in Iraq and Afghanistan, so you'll see the influence of these deadly weapons in this list of the US Army's top inventions for 2007. Every year the Army selects the top refinements, outright new inventions, or streamlined weaponry, and pumps out a list. This… » 7/06/08 6:00pm 7/06/08 6:00pm

How to Make a 25mm Bolt Action Sniper Rifle out of PVC Piping



How-to website Instructables is running Launch It, a contest for people to send in their homemade inventions. And here's one of the entries, a 25mm pneumatic cannon. Boasting a two-and-a-half-foot barrel that is one inch in diameter, the rifle has custom bolt-action mechanism, a modded sprinkler valve as the primary… » 9/19/07 10:43am 9/19/07 10:43am