WinGun (Gun Heaven) Webley MKVI Revolver 4 inch police model (Weathered)Specification Build Material : Zinc Alloy Copper ABS Plastic Steel Shell Capacity : 6 Rounds ( 6mm BB bullet ) Overall Length : 240 mm Inner Barrel Length : mm Weight : 968 g Fire Mode : Single Action Power Source : 12g CO2 Cartridge Power : ~ 370 FPS Package Includes : Airsoft Revolver, 6 . 455 style Shells, Manual The real steel counterpart to the Webley Revolver (also known as the Webley Top Break Revolver or Webley Self Extracting Revolver) was,