Simply one of the BEST Airsoft pistols currently in production! CO2-powered fully functioning blow-back system with a working slide lock and safety lever. Full Metal. Comes with an integrated 14mm CCW threaded tip. This upgraded model of the EF 1911 A1 also has special features like Two-tone color scheme, a lower rail for mounting lights/lasers, a skeletonized hammer and trigger, and improved serrations on the slide!