Umarex H&K VP9 GBB FDE Airsoft Pistol. Powered by green gas, this Airsoft pistol holds 22 6mm BBs. The blowback design and metal slide combine to provide realistic feedback when firing a round, while sending BBs downrange at 325 FPS. White dot fixed sights keep you on target while the accessory rail allows mounting of furniture such as laser sights and flashlights. This premium grade airsoft pistol combines high-performance with high value, and is perfect for those looking for a powerful Airsoft Pistol on a budget; without having to make compromises in quality or performance. Backstraps that you can customize/replace. Steel Ambidextrous Slide Catch Release Lever. Umarex H&K VP9 GBB FDE Airsoft Pistol Specifications. Power Source: Gas Airsoft. Caliber: 6 mm BBs. Capacity: 22 rounds (BBs). Weight: 1.64 lbs. Overall length: 8 in. Barrel length: 3.75 in. If the wrong contact details are provided any losses incurred as a result will be the buyers responsibility.