Primary Weapons Systems MK114 Mod 2-M, Upper Receiver, 223 Wylde, 14.5" Barrel, No Muzzle Device, Anodized Finish, Black, MLOK Handguard, Long Stroke Piston System, Adjustable Gas System, Fits AR-15 MK1-M2U-223-14-NC MK1M2U22314NC

PWS MK114 Mod 2-M Upper Receiver | .223 Wylde | 14.5" Barrel | Long Stroke Piston | MK1M2U22314NC Primary Weapons Systems MK114 Mod 2-M Upper Receiver – .223 Wylde | 14.5" Barrel | Long Stroke Piston | MK1M2U22314NC The Primary Weapons Systems MK114 Mod 2-M Upper Receiver is a premium, piston-driven AR-15 upper assembly designed for shooters who demand superior reliability, accuracy, and modern features. Chambered in .223 Wylde, this upper features a 14.5-inch barrel paired with PWS’s renowned long stroke piston system and an adjustable gas block. The Mod 2-M design includes a sleek M-LOK handguard for maximum accessory mounting options. Finished in a durable black anodized coating, this upper is built to deliver consistent performance in demanding conditions while offering the flexibility of an adjustable gas system. Whether you’re building a tactical rifle, a precision carbine, or a high-reliability defensive weapon, the MK114 Mod 2-M provides a robust and feature-rich foundation. Key Features of the Primary Weapons Systems MK114 Mod 2-M Upper .223 Wylde Chambering – Optimized chamber delivers exceptional accuracy with both .223 Remington and 5.56 NATO ammunition. 14.5" Barrel – Provides an excellent balance of velocity, maneuverability, and overall rifle length. Long Stroke Piston System – PWS’s proven long stroke piston design reduces fouling in the receiver and improves reliability. Adjustable Gas System – Allows users to fine-tune gas flow for optimal performance with various ammunition and suppressor use. M-LOK Handguard – Lightweight and modular M-LOK handguard offers extensive mounting options for accessories. No Muzzle Device Included – Allows builders to install their preferred muzzle device or suppressor mount. Anodized Black Finish – Durable hard coat anodizing provides corrosion resistance and a professional appearance. Why Choose the Primary Weapons Systems MK114 Mod 2-M Upper Receiver? The Primary Weapons Systems MK114 Mod 2-M Upper Receiver stands out as a top-tier choice for builders seeking a piston-driven AR-15 platform. Unlike traditional direct impingement systems, the long stroke piston system keeps the operating system cleaner by preventing carbon fouling from entering the receiver. This results in greater reliability, especially during high-round-count sessions or when running suppressed. The adjustable gas system gives shooters precise control over gas flow, making it ideal for tuning the rifle to different ammunition loads or when adding a suppressor. The .223 Wylde chamber ensures outstanding accuracy across a wide range of bullet weights, while the 14.5-inch barrel maintains a compact profile without sacrificing too much velocity. Primary Weapons Systems has built a strong reputation for innovation and quality, and the MK114 Mod 2-M continues that legacy with its refined design and thoughtful engineering. Whether you’re building a home defense rifle, a suppressed SBR, or a versatile tactical carbine, this upper delivers the performance, reliability, and customization options serious shooters demand. This upper receiver is an excellent choice for suppressed builds, tactical rifles, and high-reliability AR-15 platforms. Specifications Manufacturer: Primary Weapons Systems (PWS) Model: MK114 Mod 2-M Model Number: MK1M2U22314NC UPC: 811154033222 Caliber: .223 Wylde Barrel Length: 14.5" Gas System: Long Stroke Piston with Adjustable Gas Block Handguard: M-LOK Finish: Black Anodized Muzzle Device: None Included Platform: AR-15 Ideal Applications for the PWS MK114 Mod 2-M Upper This upper receiver is ideal for building suppressed rifles, tactical carbines, home defense weapons, and precision-oriented AR-15 platforms. Experience premium piston-driven performance with the Primary Weapons Systems MK114 Mod 2-M Upper Receiver. A feature-rich .223 Wylde upper featuring a long stroke piston system, adjustable gas block, and M-LOK handguard. The End