The MCR (Mission Configurable Rifle) belt-fed upper receiver assembly revolutionizes firearm versatility by seamlessly integrating with standard AR/M4-type uppers and fitting any MIL-Spec lower receiver without requiring permanent modifications. Engineered for ultimate compatibility, this cutting-edge system is rearward compatible with AR-15/M16 models dating back to 1963. Setting a new benchmark in performance, the MIL-Spec MCR 5.56x45mm DFR enhances our proven MCR technology with critical upgrades, including Dry Film Lubrication on high-friction surfaces, ensuring superior durability and reliability in extreme conditions. Once installed, the patented MCR upper receiver system allows users to adapt configurations in seconds, tool-free, making it the ultimate mission-ready solution. Designed for responsible armed citizens, law enforcement, and professional security personnel seeking to elevate their rifle or carbine to MCR performance levels, this system delivers unmatched capability. Standard features include a gas-piston operation for exceptional reliability in adverse environments, a 16.25 inches quick-change barrel system that swaps in just three seconds, and a MIL-STD 1913 co-planar handguard with a rail-interface system for seamless integration of optics and modern accessories. From an optic-ready carbine to a lightweight support rifle, the MCR offers unparalleled flexibility. Operators can utilize standard AR-15/M16 box magazines or M27 linked ammunition at their discretion, enabling unprecedented firepower and adaptability for any mission.

Drop-on (Mil-Spec) upper receiver assembly upgrades your AR-15/M16/M4 lower receivers or rifles, enhancing performance and compatibility with Mil-Spec standards
The 5.56 x 45mm round offers versatility and reliability in a variety of firearms
The 16-1/4 inches quick-change barrel allows for easy swapping without tools
Features a 1:7 inches RHT, 1/2-28 TPI
Short-stroke gas piston operation, providing enhanced reliability and reduced fouling compared to traditional direct impingement systems, ensuring smooth operation
Dual feed accepts all AR-15/M16 magazines and M27 linked ammunition, offering exceptional versatility for rapid and efficient reloading
Precision-machined 7075-T6 billet upper receiver, feed cover and charging handle, providing maximum durability and performance for your firearm
Precision-machined billet steel feed tray, ensuring high-strength and reliability for the feeding system
The finish includes manganese phosphate and type III, class 2 hard coat anodize black for maximum corrosion and wear resistance, ensuring longevity and resilience in harsh environments
A dry film lubricant is applied to critical high-friction surfaces, reducing wear and improving the longevity and performance of your firearm
The full-auto bolt carrier ensures reliable and smooth cycling, providing a consistent shooting experience for those using automatic firing modes
The handguard style follows the MIL-STD-1913 rail design, offering a robust mounting platform for optics, lights and other accessories for enhanced firearm versatility
Adjustable sight set allows for fine-tuning sighting system for increased accuracy
Quick-change barrel handle, enabling fast and efficient barrel swaps with minimal effort
Ships with belt-feed main action spring, Mil-Spec H3 buffer, carbine stock spacer, extended bolt catch, mag adapter, RIP brake muzzle compensator, (100) M27 links and operator's manual, providing all necessary components for full setup and operation
Made in the USA, this product is built with quality standards, reflecting excellence in American manufacturing

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These items are controlled by the U.S. Government and authorized for export only to the country of ultimate destination for use by the ultimate consignee or end-user(s) herein identified. They may not be resold, transferred, or otherwise disposed of, to any other country or to any person other than the authorized ultimate consignee or end-user(s), either in their original form or after being incorporated into other items, without first obtaining approval from the U.S. government or as otherwise authorized by U.S. law and regulations.

Local Law Compliance

Certain firearm parts and accessories, including AR-style upper receivers, are subject to complex and frequently changing federal, state, and local laws and regulations. While an upper receiver may be lawfully sold and shipped as a component, the legality of possessing, assembling, configuring, or using an upper receiver in certain states (e.g., California, Washington State) and localities depends on how it is assembled, combined with other components, and ultimately used. You are solely responsible for ensuring that any assembly, configuration, possession, or use complies with all federal, state, and local laws, including any so-called “assault weapon” bans and short-barreled rifle restrictions. We do not provide legal advice and are not responsible for unlawful configurations or uses.

FightLite MCR Dual-Feed 16.25" Upper 5.56x45mm 1:7 Mil-Std 1913 Picatinny Rail, Black