This is the "PTP" line of M9 Gas blowback by KJW. This very model is being used by US Military & Law Enforcement for training today, hence it's performance and realism. Externally, this pistol is as real as it gets with blowback action, full metal slide & frame, on frame safety, magazine release, shooter's grip, adjustable hopup and tons more other features. Basically, it is the one gas gun with the most metal parts in the market today. Internally this new version is equipped with the newest reinforcement parts that are so durable you can power it with Co2, Propane or red gas. Manufacturer: KJ Works (KJW) Dimensions: 8.5" Long x 5.25" Tall. Barrel Length: 5". Weight ~2 lbs. Muzzle Velocity: 300~340 FPS. Magazine: 25+1 (Green gas Mag included. Co2 Mag available) Use all KJW M9 series magazine. Power: Green gas, propane adapter, red gas, CO2 (With CO2 Magazines) (NOT INCLUDED) Hopup: Yes, adjustable. Features: - Full Metal Heavy Weight New Version Aluminum Slide and Frame. - Able to handle high pressured gas: green gas, red gas, Co2, Propane adapter. - TONS of after market upgrade / replacement parts available. - Hard Kick Blowback Action / Working Realistic Hammer action. - Great accuracy and performance. - Standard Military Type Tactical Grip. - Ambidextrous on frame safety. - Built in front & rear sight with high visibility white dot. - Reinforced metal steel parts on entire pistol. - Built in lanyard adapter, a spec. requested by the US military to KJW. For increased tactical advantage and realism. - On Slide Serration. - Its a KJW: Marui Design, reputable manufacture Review: First impression and feel: Perfect. It is heavier than a HFC M9, the finish is flawless, with working hammer, slide, safety, magazine release...it is as realistic as it gets. Performance: The New KJW is equipped with the most reinforcement parts there is. In fact, KJW is the OEM for many after-market upgrade parts brands such as Guarder & Tanio Koba for the Tokyo Marui M9. Overall: If you are looking for a M9, you cannot go wrong with this one. It is simply the best out there. When it comes to picking an Airsoft gun, you want something reliable, accurate, realistic and have manufacture / after market part support right and this one's got it all.