The new Castle Doctrine Modern Sporting Rifle (CD-10 and CD-15) comes with a new OSS suppressor for reduced flash and noise upon firing. The OSS Suppressor is manufactured with suppression technology based on real world, wartime, and commercial demands. The component combines all OSS technologies into a single unit creating a revolutionary modular suppression device that utilizes 12 patented technologies. This system is specifically engineered to a weapon’s operating system, caliber, and barrel length. The OSS Suppressor unit effectively reduces visual and audio signature, back pressure, expelled gases, and operating system wear to give shooters optimal suppression performance. The CD AR is inspired by the Castle Doctrine and designed with force and protection in mind.