The ASD has been a long time in coming. For years I've tilted my gun to hook bbs and make otherwise impossible shots. Problem was you could never get as much hook as you wanted, and messing with your adjustment wheel is a PITA when you spent so much time getting your hop set just right. I wanted a muzzle attached hop unit basically. Then when playing with PB one day I came across the APEX barrel system. I liked the idea, but wasn't a huge fan of their execution. Crude adjustment, limited range of rotation, short "kicker," and worst of all it was only for paintball guns. So began the experiments which have lead to this working prototype. More videos and info to follow. Short setup guide: the design is self explanatory, but apparently some people don't like to problem solve. The short version is: -Test fit everything before assembly on your gun. -Put the smaller adjustment ring over your outer barrel, thread the ratchet onto your outer barrel. -Install the kicker pivot into the central body -slip the outer adjustment ring over the central body - set this against the ratchet on your muzzle, and pull the smaller adjustment ring up over the ratchet and bayonet it onto the main body -Slip the tuning fork through the top of the kicker, slip it in its channel on the outer adjustment ring, and then press its pin through. -Crimp the end of the pin slightly for a more permanent install. -Add some sort of thin rubber mat to the face of the kicker to increase friction and therefore applied spin.