You can go to their website they have info on how it works. No springs, that is what makes it different from the Akins device. The grip and stock are one piece. There is a clip with two flanges at bottom that connects to base of receiver where grip bolts on, the stock and grip slides over the buffer tube. It is essentially a bump fire stock. Your finger rests on a block and you have to pull the gun forward, when you do it goes bang, recoil pushes it back, if you are still pushing gun forward then you are sliding it into your finger again and so on.