The Anson Firefly is a small pistol based on the pop-out design that was originally patented by Henry Quackenbush in 1877. Quackenbush was an exceptional and prolific American air gun designer of the late 19th century and whilst he is credited as the original designer of the pop-out pistol, he never produced one. Strangely enough, Quackenbush’s design went on to become the most copied and successful of all air pistols. [1]