This isn't the first time something like this has been introduced. I believe during WWII they had an attachment for the Thompson that allowed you to shoot at a 90 degree angle, but it was only good for so many shots. Pretty nifty though...
BTW, doesn't that look like a Glock at the front?
http://news.telegraph.co.uk/news/ma.../16/ixworld.html/news/2003/12/16/wshoot16.xml
BTW, doesn't that look like a Glock at the front?
http://news.telegraph.co.uk/news/ma.../16/ixworld.html/news/2003/12/16/wshoot16.xml