Primary Arms PWS MK114 Mod 1-M Upper | 223 Wylde 14.5″ AR-15 Upper Receiver

Upgrade your AR-15 with the Primary Weapons Systems MK114 Mod 1-M Upper Receiver, a precision-engineered rifle upper built for performance, reliability, and versatility. Chambered in 223 Wylde for optimal accuracy with both .223 Remington and 5.56 NATO ammunition, this upper features a 14.5-inch barrel with a durable anodized finish designed to withstand hard use in the field or on the range.

The MK114 Mod 1-M is a testament to PWS craftsmanship, delivering the kind of fit, finish, and mechanical precision that competitive shooters, hunters, and serious AR-15 enthusiasts demand. Whether you’re building a compact patrol rifle, a competition-ready carbine, or a versatile home defense platform, this upper receiver offers a high-quality foundation that pairs seamlessly with standard mil-spec AR-15 lower receivers.

**Key Features:**
– Chambered in 223 Wylde for enhanced accuracy with .223 Rem and 5.56 NATO
– 14.5″ anodized barrel for durability and corrosion resistance
– Compatible with standard AR-15 mil-spec lower receivers
– Built by Primary Weapons Systems, a trusted name in precision AR-platform components
– Designed for competitive shooting, hunting, and tactical applications

Please note: The 14.5-inch barrel length may require a permanently attached muzzle device to meet NFA overall length requirements. Consult applicable federal and state laws before purchase.

Order online at Deep Roots Rifle Co or visit us in-store in Eustis, Florida, where our knowledgeable staff can help you find the right components for your build. We offer competitive pricing, fast shipping, and access to hard-to-find AR-15 components from top manufacturers like Primary Weapons Systems.