Well, you can just put the PolarStar Airsoft Fusion Engine into just about anything including this "Axe" which is the latest project announced by Bingo Airsoftworks in observance of the all-important date --- the 1st of April... "The guitar has been specially modified so it uses the strum bar as the trigger, so you can do extremely fast semi-auto fire by strumming up and down. The whammy bar is used to enable full auto mode.