Primary Weapons Systems MK111 Mod-1M Upper, Fits AR15, 223 Wylde, 11.85" Barrel, Black Color, Anodized Finish, PWS M-lok 6.9" Handguard MK1-M1U-223-11 MK1M1U22311

Primary Weapons Systems MK111 Mod-1M Upper | 223 Wylde | 11.85" Barrel | MK1-M1U-223-11 Primary Weapons Systems MK111 Mod-1M Upper Receiver – 223 Wylde | 11.85" Barrel | M-LOK Handguard | MK1-M1U-223-11 The Primary Weapons Systems MK111 Mod-1M Upper is a high-performance AR-15 upper receiver assembly designed for shooters who demand reliability, accuracy, and modern features in a compact package. Chambered in 223 Wylde, this upper features an 11.85-inch barrel paired with a 6.9-inch PWS M-LOK handguard. Finished in a durable anodized black, the MK111 Mod-1M offers excellent maneuverability while maintaining the precision and quality that Primary Weapons Systems is known for. This complete upper is an ideal choice for building a short-barreled rifle, pistol, or SBR configuration. Key Features of the Primary Weapons Systems MK111 Mod-1M Upper 223 Wylde Chambering – Optimized chamber allows for excellent accuracy with both .223 Remington and 5.56 NATO ammunition. 11.85" Barrel – Compact barrel length provides superior handling and maneuverability in close-quarters environments. PWS M-LOK Handguard – 6.9-inch lightweight M-LOK handguard offers ample accessory mounting options while keeping weight low. Anodized Black Finish – Durable anodized finish provides excellent corrosion resistance and a professional appearance. AR-15 Compatible – Designed to fit standard AR-15 lower receivers for easy customization and builds. Premium Construction – Built with high-quality components for long-term reliability and consistent performance. Why Choose the Primary Weapons Systems MK111 Mod-1M Upper? The Primary Weapons Systems MK111 Mod-1M Upper is an excellent choice for builders and shooters looking for a compact, high-quality upper receiver assembly. The 223 Wylde chamber provides the best of both worlds, delivering match-grade accuracy with a wide variety of ammunition. The short 11.85-inch barrel makes this upper ideal for short-barreled rifle (SBR) builds, AR pistols, or any setup where maneuverability is a priority. The 6.9-inch M-LOK handguard strikes the perfect balance between protection and accessory mounting options while keeping the overall length minimal. Primary Weapons Systems has built a strong reputation for producing durable and innovative AR components, and the MK111 Mod-1M continues that tradition with its robust construction and thoughtful design. Whether you’re building a home defense weapon, a competition rifle, or a compact tactical platform, this upper offers the performance and features needed for serious use. Its compatibility with standard AR-15 lowers makes it a versatile foundation for any custom build. This upper receiver is an excellent choice for SBR builds, AR pistols, and compact tactical rifles. Specifications Manufacturer: Primary Weapons Systems Model: MK111 Mod-1M Upper Model Number: MK1-M1U-223-11 UPC: 811154033468 Caliber: 223 Wylde Barrel Length: 11.85" Handguard: PWS M-LOK 6.9" Finish: Anodized Black Compatibility: AR-15 Platform Ideal Applications for the Primary Weapons Systems MK111 Mod-1M Upper This upper is ideal for short-barreled rifle builds, AR pistols, home defense, and tactical applications. Experience the performance of the Primary Weapons Systems MK111 Mod-1M Upper. A premium 223 Wylde AR-15 upper featuring an 11.85" barrel and M-LOK handguard. The End