Sig Sauer MCX Virtus 300 Blackout Pistol with Stealth Gray Finish for sale. Conceived for the demands of the Special Operations community, the MCX VIRTUS Pistol from SIG SAUER is engineered for adaptability, sound suppression and longevity. Cold hammer-forged barrels are user-changeable, offering the utmost in mission-specific flexibility. SIG’s proven internal recoil system offers reduced recoil and a compact platform. To enhance accuracy, the MCX VIRTUS Pistol features the new Matchlite™ Duo trigger for crisp, clean feel. Free-floating M-LOK handguards are available in four lengths. Ambidextrous, AR-style controls and a folding PCB enable the MCX VIRTUS Pistol to be stowed with ease. Built with the highest-quality components, the MCX VIRTUS Pistol sets a new standard for size, accuracy and reliability.