Webley Tempest in Caliber 4.5 mm top strainer air pressure gun which is very powerful. The barrel is also the straining arm which clicks up to strain the spring. Webley was originally a very old company from England, later the Webley's were made in Turkey (including this one) Brand: Webley Model: Tempest Calibre (mm): 4.5 /.177 Energy (Joule): 4.2 Speed: (manufacturer m/s): 140 Power source: Spring Magazine: No Capacity: Single-shot Safety Yes, manual trigger safety security Weight (grams): 910 Total length: 232 mm Visor: Yes, adjustable. Handle: Right handed with thumb edition Handle material: Black synthetic plastic Status: New