The Ultimate Shotgun Stock - The GPS shotgun stock with patented recoil system was invented by Sai Chiang through years of being a competitive shotgun shooter, and most importantly, listening closely to what shooters want of their shotgun stocks. Through years of development, we created an innovative shotgun stock that can custom fit 99.9% of shooters requirements. Also, our custom hand molded grip design increases the comfort and ergonomic control during target acquisition and firing of the shotgun. (less)