The Cybergun "High Efficiency" series Airsoft pistol is designed with optimized gas efficiency with an unbelievable / impressive capability of firing up to 170 shots of Airsoft bbs on one single 12g Co2 cartridge, where the first 70 rounds are closed above 350 FPS. In the world of Tokyo Marui system Airsoft pistols capable of firing 20~30 rounds per 12g Co2 cartridge this is an efficiency of over 400%! Externally each Cybergun "High Efficiency" series Colt M45A1 pistol features a fully licensed 1:1 scale authentic replica equipped with a full metal slide, detachable magazine, superior accuracy and much more! After extensive testing, we have been able to compile the chart below for your fps range reference on a single standard 12 gram CO2 cartridge: FPS 370-390, shot count: 1-40 FPS 330-370, shot count: 41-70 FPS 290-310, shot count: 71-120 FPS 170-290, shot count: 120-170 Please note test result can vary based on temperature and rate of fire. Great for recreational games or as a prop. For high power AEG and Gas guns please visit our AEG and GBB section of the website. Features Full licensed by KAHR ARMS with trademarks Spring power requires no gas or batteries to operate Lightweight polymer frame and slide Detachable magazine holds up to 16 rounds 1:1 Scale authentic and licensed full size replica