PWS MK116 Compound 5.56/.223 Wylde 16.1″ Piston-Driven AR-15 Rifle – Black

The PWS MK116 Compound Rifle brings together the best of Primary Weapons Systems engineering in a single, purpose-built package. Combining the proven Mod 1 upper with the refined Mk1 Mod 2 lower, this rifle delivers a versatile, high-performance platform chambered in .223 Wylde — giving you the accuracy of .223 Remington with the flexibility to run 5.56 NATO ammunition. At the heart of the MK116 Compound is PWS’s renowned long-stroke piston operating system, developed after extensive real-world testing on high-volume fire scenarios. Unlike traditional direct-impingement AR-15 designs, the long-stroke piston keeps propellant gases and carbon fouling away from the bolt carrier group, dramatically reducing maintenance demands in adverse conditions and during extended range sessions. The result is a rifle that runs cleaner, cooler, and more reliably — session after session. With a 16.1″ barrel, this configuration strikes the ideal balance between maneuverability and ballistic performance, making it well-suited for home defense, competitive shooting, hunting, and general-purpose use. PWS has built a reputation since 2008 for uncompromising quality and innovation, and the MK116 Compound is a testament to that legacy. Whether you’re a serious competitor, a dedicated hunter, or a discerning enthusiast looking for a premium piston AR, this rifle is built to exceed expectations. Order the PWS MK116 Compound online at Deep Roots Rifle Co for fast shipping nationwide, or stop by our gun store in Eustis, Florida to see it in person. Our knowledgeable staff is ready to help you find the right rifle for your needs.