“Where else but the good ole US of A would we revel in crafting items that not only utilized that oh-so-lonely USB port on the rear of your leased laptop, but had the potential to "deliver welts" to unsuspecting co-workers? While the pre-packaged USB missile launchers are quite the novel desk adornment, this DIY job seriously brings the heat (and the pain). While the modder responsible here envisions a more robust, costly, and dangerous version in the future, his 1.0 edition features a $19 electronic AirSoft gun, the turret base from an aforementioned USB missile launcher, super glue, and the usual compliment of assembly tools. After disassembling the launcher and tapping into its base, a bit of fancy wire work is required to affix the more powerful AirSoft gun to the rotating turret. A few more screws and finagling, and you're all set to demolish the fun at your annual holiday bash, all for just around $70 and a few hours of your time. So if you couldn't handle boot camp, but still have a passion for mechanical sentries, be sure to hit the read link for the full skinny.” http://www.engadget.com/2006/12/11/usb-airsoft-turret-mows-down-unsuspecting-office-mates/
Another More Powerfull turret.