The MK1 MOD 1-M line is engineered for reliability and performance, featuring the renowned PWS long stroke piston system that has earned the trust of dedicated users. This tried-and-true system delivers exceptional reliability and function, making it a preferred choice for both civilians and law enforcement professionals alike. With its free-floating M-LOK handguard and forward assist controls, the MK1 MOD 1-M provides enhanced flexibility and ease of use, while staying true to a more authentic mil-spec design. Built with fully forged upper and lower receivers, the MK1 MOD 1-M is a robust, no-nonsense tool designed to handle demanding tasks with precision and durability. Whether you're in the field or at the range, this rifle is a relentless performer, offering high-value without compromising on quality. The MK1 MOD 1-M is the ideal choice for those who require a dependable, unstoppable rifle that excels under pressure and provides long-lasting performance. The 16.1 inches .223 Wylde barrel is compatible with both .223 Remington and 5.56 x 45mm ammunition The barrel twist rate is 1:8, designed for optimal stability and accuracy with a wide range of bullet weights Muzzle velocity 2980 fps, ensuring high-impact energy and precision at extended ranges PWS FSC 556, a muzzle device designed to reduce recoil and muzzle rise for more stable shooting PWS proprietary piston upper, T6 7075 forged, anodized, ensuring reliability and durability with a high-quality piston-driven operating system PWS M-LOK 15.05 inches handguard, providing a sleek and ergonomic platform for mounting accessories with an M-LOK system Radian Raptor ambidextrous charging handle, allowing for smooth, efficient operation from either side of the rifle