The current generation of bumpfire devices are nice, but they limit your options. You need to replace the stock and the grip on your rifle to get them to work, and if you have an AR-15 pistol then you’re just plain out of luck. One 18-year-old college student decided to try and fix that situation, and has come up with what he’s calling the “SlipGrip.” The idea is similar to the bumpfire stock, except the only thing that moves is the grip. Perfect for AR-15 pistols and those who don’t want to swap out the stock on their rifle. Easier to install, too. Will it ever actually come to market? Dunno, but we hope so.