Primary Weapons M114UA01-2F-NC MK114 Mod 1-M Upper 223 Wylde 14.50" Anodized Barrel for AR-15

The Primary Weapons M114UA01-2F-NC MK114 Mod 1-M Upper 223 Wylde 14.50" Anodized Barrel is a precision-engineered upper receiver assembly purpose-built for tactical operators, competitive shooters, and professional end-users who demand reliability in demanding environments. This complete upper combines proven Primary Weapons Systems quality with the flexibility of 223 Wylde chambering, making it ideal for both duty-rated applications and high-volume training. Whether you're building a dedicated patrol rifle, recce platform, or competition gun, this upper delivers the versatility modern operators require without sacrificing accuracy or durability.

Built on Primary Weapons' proven MK1 platform, this upper features a 14.50-inch anodized barrel in 223 Wylde chambering—a hybrid round that safely and reliably fires both 5.56 NATO and .223 Remington ammunition, giving shooters unmatched flexibility in the field. The anodized finish provides superior corrosion resistance and durability against environmental degradation, critical for hard-use tactical applications. At 4.9 lbs, the upper delivers a balanced profile that reduces fatigue during extended operations while maintaining the structural rigidity necessary for precision fire. The MK114 Mod 1-M configuration is optimized for close-quarters and intermediate-range engagements, making it equally at home in urban environments or transitional spaces where compact profile matters.

This upper receiver assembly is compatible with any standard AR-15 lower receiver and accepts all industry-standard components, making it a plug-and-play solution for builds or upgrades. The 14.50-inch barrel length balances velocity retention with maneuverability—ideal for professional duty rifles, SBR builds, and shooters operating in confined spaces. Installation requires no gunsmithing; simply interface the upper with your AR-15 lower, and you're ready for duty or training. Primary Weapons' reputation in the law enforcement and military community reflects decades of proven performance, and this M114UA01-2F-NC upper maintains that standard.