Editing Spimmy (section)

== Operating system ==

The principal difference between a Spimmy and a conventional Spyder is the firing mechanism.

The original Spyder uses a stacked-tube blowback design in which a spring-driven striker opens the valve. Gas pressure subsequently recocks the mechanism.

Electronic Spyder models retain this basic operating system while replacing the mechanical trigger linkage with an electronically activated sear.

A Spimmy instead uses an electropneumatic solenoid to control a pneumatic ram, following the operating principles of the Bob Long Intimidator.[1]

The conversion therefore changes the marker's underlying firing mechanism rather than simply adding electronic trigger controls or aftermarket accessories.