Precision Reflex MK12 MOD-H .223/5.56 16" Complete Upper Receiver 07-55616-MHB-D17

Build a high-performance precision rifle with the Precision Reflex MK12 MOD-H .223/5.56 16" Complete Upper Receiver 07-55616-MHB-D17. Precision Reflex, Inc. (PRI) has long been recognized as a leader in manufacturing premium AR-15 components, and the MK12 MOD-H upper represents the pinnacle of their engineering. This complete upper receiver assembly is designed for shooters who demand exceptional accuracy, reliability, and durability in a 16-inch package. Chambered in .223 Remington / 5.56 NATO, this MK12-style upper features a match-grade barrel, free-float handguard, and precision-machined components that deliver sub-MOA performance when paired with quality ammunition. Whether you’re building a dedicated precision rifle, a tactical carbine, or a competition-ready platform, the PRI MK12 MOD-H offers the perfect combination of features for long-range shooting, tactical applications, and serious recreational use. The black finish provides a professional, low-profile appearance while offering excellent corrosion resistance.

Why Choose the Precision Reflex MK12 MOD-H Upper?

The Precision Reflex MK12 MOD-H Complete Upper stands out from standard AR-15 uppers due to its specialized design and high-quality components. Inspired by the legendary MK12 Special Purpose Rifle used by U.S. Special Operations forces, this MOD-H variant brings modern precision features into a more versatile 16-inch configuration. Precision Reflex uses only the highest quality materials and manufacturing processes to ensure each upper meets strict performance standards. The 16-inch barrel provides an excellent balance between velocity, maneuverability, and accuracy, making it suitable for a wide range of applications from 300 to 600+ yards. The free-float handguard system eliminates contact with the barrel, allowing for maximum accuracy potential by reducing harmonic interference. Shooters who demand consistent, repeatable performance will appreciate the attention to detail that goes into every PRI MK12 upper.

Precision Machined for Superior Accuracy

The Precision Reflex MK12 MOD-H is built with accuracy as the primary focus. The 16-inch barrel is manufactured using high-quality steel and precision rifling to deliver consistent sub-MOA groups when used with match-grade ammunition. The free-float handguard system ensures that nothing interferes with the barrel’s harmonics, allowing the rifle to achieve its full accuracy potential. This level of precision makes the MK12 MOD-H an excellent choice for long-range target shooting, precision rifle competitions, and tactical applications where shot placement is critical.

Complete Upper Receiver Assembly

This is a true complete upper receiver, meaning it arrives ready to install on your existing AR-15 lower receiver. The package includes a precision barrel, free-float MK12-style handguard, gas block and tube, bolt carrier group, and charging handle. This saves builders significant time and ensures all components are properly matched and headspaced for optimal performance. The complete nature of this upper makes it an ideal choice for both first-time builders and experienced gunsmiths looking for a high-quality, drop-in solution.

Ideal for Precision and Tactical Shooters

The Precision Reflex MK12 MOD-H 16" Upper is perfectly suited for shooters who require a balance of accuracy, reliability, and maneuverability. The 16-inch barrel length offers better velocity than shorter barrels while remaining compact enough for tactical or home defense use. This upper is an excellent foundation for building a precision AR-15, a designated marksman rifle (DMR), or a high-performance competition rifle. Its robust construction and quality components also make it a strong choice for professional users who need dependable equipment in demanding environments.

Why Choose Precision Reflex, Inc.?

Precision Reflex, Inc. has built a reputation for manufacturing some of the finest AR-15 components available. Their MK12 series uppers are respected by precision shooters and professionals alike for their attention to detail, quality materials, and consistent performance. When you choose a PRI MK12 MOD-H upper, you’re investing in a product that reflects decades of experience in the firearms industry.

Build a precision rifle you can trust with the Precision Reflex MK12 MOD-H .223/5.56 16" Complete Upper Receiver 07-55616-MHB-D17. This premium complete upper from Precision Reflex, Inc. features a 16-inch match-grade barrel, free-float MK12-style handguard, and precision components designed for exceptional accuracy and reliability. Chambered in .223 Remington / 5.56 NATO, this black-finished upper is ready to install on your AR-15 lower receiver and deliver sub-MOA performance. Whether you’re building a long-range precision rifle, a tactical carbine, or a competition platform, the MK12 MOD-H offers the perfect combination of features for serious shooters. With its complete assembly and high-quality construction, this upper provides everything needed for outstanding accuracy and dependable function. Add the Precision Reflex MK12 MOD-H Complete Upper to your build and experience the performance that precision shooters have come to expect from PRI.