Primary Weapons MK1-M1U-223-11 MK1 Mod 1-M Upper 223 Wylde 11.85" Black Anodized Barrel for AR-15
Primary Weapons
SKU: 22360
UPC: 811154033208
MPN: MK1-M2U-223-11
The Primary Weapons 182M111UA0B MK1 Mod2-M Upper in 223 Wylde is a precision rifle upper receiver assembly built for operators who demand reliability and modularity in demanding environments. Designed as a complete upper for AR-15 platforms, this assembly eliminates guesswork in component matching and delivers the kind of quality control that law enforcement and military end-users depend on in the field. Whether you're building a duty rifle, a precision trainer, or a versatile multi-purpose platform, this upper handles the core ballistic and structural load with consistent performance.
At its core, this upper features an 11.85-inch barrel chambered in 223 Wylde—a caliber that bridges the velocity advantage of 5.56 NATO with the precision potential of .223 Remington, making it ideal for both duty and accuracy-focused applications. The 7075-T6 aluminum receiver is aerospace-grade material that balances weight and rigidity; at 4.75 pounds, the upper delivers minimal fatigue during extended carry or operation while maintaining the structural integrity needed to handle sustained fire. The 11-inch PWS PicLok handguard offers true modularity, accepting both M-Lok and Picatinny accessories without rail swapping, allowing rapid reconfiguration for optics, lights, and tactical equipment. The optics-ready design accommodates standard flat-top receivers and direct-mount accessories, eliminating the need for adapter plates or compromised sight lines.
This assembly suits shooters ranging from law enforcement qualification and duty builds to competition and professional training environments. The 11.85-inch barrel length balances ballistic efficiency with maneuverability—short enough for close-quarters operations but long enough to maintain reliable velocity and accuracy to intermediate ranges. Installation is straightforward: the upper sits directly onto any standard AR-15 lower receiver, requiring only barrel nut torque and proper alignment. Ensure your lower receiver is rated for 223 Wylde (most modern lowers are forward-compatible); verify that your charging handle and bolt carrier group are properly seated for reliable operation. This upper ships as a complete assembly, ready to accept your choice of bolt carrier group, charging handle, and trigger pack from your lower receiver.
WARNING ⚠️ You must be 18 or older to purchase shotgun or rifle ammunition and 21 or older to purchase handgun ammunition and firearms. Please reference our requirements for ammunition orders to "restricted" states HERE. Always make sure you use the correct ammunition for your firearms. Ammo cannot be shipped to a PO Box. Please reference state & local laws before making a firearm or ammunition purchase.