It may not be the first time than an actual weapon has been equipped with an FPS-style ammo counter (or Aliens pulse rifle-style, if you prefer), but this add-on device built by the DIY-minded Michael Ciuffo is certainly still plenty impressive enough to garner some attention on its own. It simply uses an accelerometer to detect the recoil from the gun, and it can apparently be adjusted for use on a variety of different weapons. What's more, Michael says that he's already gotten so many requests for one that he's planning on putting it into production. Head on past the break to check it out in action.