Kracern 1911 is the latest to review the Sig Air ProForce M17 gas blowback pistol that is made by VFC. The ProForce P320 M17 is a high-quality, 200mm replica pistol, constructed from a blend of polymer and metal alloy. It operates in single-fire mode, powered by gas with a working blowback system that mimics the real firearm action. The gun, weighing approximately 760g, uses a 21-round detachable magazine.