Primary Weapons Systems MK116 MOD 1-M, Upper Receiver, Fits AR-15, 223 Wylde, 16.1" Barrel, 1:8" Twist, FSC 556 Muzzle Device, 15.05" PWS MLOK Handguard, Anodized Finish, Black, Includes Radian Raptor Ambidextrous Charging Handle MK1-M1U-223-16 MK1M1U22316

Primary Weapons Systems MK116 Mod 1-M Upper | 223 Wylde | 16.1" Barrel | MK1-M1U-223-16 Primary Weapons Systems MK116 Mod 1-M Upper Receiver – 223 Wylde | 16.1" Barrel | FSC556 Muzzle Device | MK1-M1U-223-16 The Primary Weapons Systems MK116 Mod 1-M Upper Receiver is a premium complete upper designed for AR-15 platforms. Chambered in 223 Wylde, this upper features a 16.1-inch barrel with a 1:8 twist rate, the highly effective FSC556 muzzle device, and a 15.05-inch PWS MLOK handguard. Finished in a durable anodized black, it comes equipped with a Radian Raptor ambidextrous charging handle for smooth and reliable operation. Built with PWS’s signature long stroke piston system and adjustable gas block, this upper delivers exceptional reliability, reduced recoil, and superior heat management compared to traditional direct impingement systems. Key Features of the Primary Weapons Systems MK116 Mod 1-M Upper 223 Wylde Chambering – Optimized chamber allows for excellent accuracy with both .223 Remington and 5.56 NATO ammunition. 16.1" Barrel with 1:8 Twist – Precision barrel provides outstanding accuracy and is ideal for a wide range of bullet weights. FSC556 Muzzle Device – PWS’s signature flash suppressor and compensator hybrid significantly reduces muzzle flash and recoil. 15.05" PWS MLOK Handguard – Lightweight and modular MLOK rail system offers ample accessory mounting options while maintaining a slim profile. Radian Raptor Charging Handle – Premium ambidextrous charging handle for fast, reliable, and ergonomic manipulation from either side. Long Stroke Piston System – PWS’s proven long stroke piston design keeps the action cleaner and cooler for improved reliability. Adjustable Gas System – Allows users to fine-tune gas flow for optimal performance with various ammunition types and suppressor use. Anodized Black Finish – Durable anodized finish provides excellent corrosion resistance and a professional appearance. Why Choose the Primary Weapons Systems MK116 Mod 1-M Upper? The Primary Weapons Systems MK116 Mod 1-M Upper is an outstanding choice for shooters looking to build a high-performance AR-15. The long stroke piston system significantly reduces carbon fouling and heat transfer to the bolt carrier group, resulting in smoother operation and longer intervals between cleanings. The adjustable gas system allows users to optimize the rifle for different loads or when running a suppressor. The included FSC556 muzzle device provides excellent flash suppression and recoil control, while the Radian Raptor charging handle adds premium ergonomics and ambidextrous functionality. The 16.1-inch barrel with a 1:8 twist delivers strong ballistic performance and exceptional accuracy. Primary Weapons Systems has built a strong reputation for producing durable and innovative AR components, and the MK116 Mod 1-M continues that tradition with its robust construction and thoughtful engineering. Whether you’re building a home defense rifle, a competition carbine, or a tactical platform, this upper offers the reliability and performance serious shooters demand. This upper receiver is an excellent choice for custom AR-15 builds, home defense, competition shooting, and tactical applications. Specifications Manufacturer: Primary Weapons Systems Model: MK116 Mod 1-M Upper Model Number: MK1-M1U-223-16 UPC: 811154033499 Caliber: 223 Wylde Barrel Length: 16.1" Twist Rate: 1:8 Muzzle Device: FSC556 Handguard: 15.05" PWS MLOK Charging Handle: Radian Raptor (Ambidextrous) Finish: Anodized Black Operating System: Long Stroke Piston Gas System: Adjustable Compatibility: AR-15 Platform Ideal Applications for the Primary Weapons Systems MK116 Mod 1-M Upper This upper is ideal for custom AR-15 builds, home defense rifles, competition carbines, and tactical applications. Experience the performance of the Primary Weapons Systems MK116 Mod 1-M Upper. A premium 223 Wylde AR-15 upper featuring a 16.1" barrel, FSC556 muzzle device, and Radian Raptor charging handle. The End