A unique pistol with the airsoft version made by Marushin gets reviewed by Mach Sakai. The Marushin COP 357 Long Barrel Version is a replica of the Derringer Pocket Pistol and has 4 inner barrels. Each barrel stores 1 6mm BB, giving it a 4 round capacity and each BB is shot out in an anti-clockwise manner when fired. It is a spring-cocking system with a fixed hop-up.