The groundbreaking MCR (Mission Configurable Rifle) belt-fed upper receiver assembly redefines versatility, seamlessly integrating with standard AR/M4 lower receivers without requiring permanent modifications. Designed for full compatibility with MIL-Spec lowers, this innovative system is even rearward-compatible with AR-15 and M16 models dating back to 1963. The MIL-Spec MCR 5.56x45mm DFR takes this technology to the next level, incorporating all the advanced features of the standard MCR government model while enhancing durability with Dry Film Lubrication on critical high-friction surfaces. This specialized coating ensures exceptional performance and longevity, even in the most extreme conditions. Engineered for responsible armed citizens, law enforcement, and professional security personnel, the patented MCR upper receiver system delivers unmatched adaptability. Once installed, it allows for rapid, tool-free configuration in seconds, ensuring seamless transitions between mission profiles. Built for extreme reliability, the gas-piston operation ensures flawless function in adverse environments, while the 16.25 inches quick-change barrel system allows barrel swaps in just three seconds, providing mission-specific flexibility. The M-LOK co-planar handguard features a rail-interface system, offering ample space for optics and modern accessories, allowing users to customize their setup to meet tactical or operational needs. Spanning the capability range from an optic-ready carbine to a lightweight support rifle, the MCR offers a level of firepower and adaptability unmatched by traditional platforms. Designed for superior operational flexibility, it accepts both standard AR-15/M16 box magazines and M27 linked ammunition, empowering operators with the ability to seamlessly switch between feeding systems. Whether enhancing a duty rifle or upgrading a personal firearm, the MCR delivers an unprecedented combination of power, precision, and reliability.

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 is M-LOK, offering a lightweight and customizable design that allows users to easily attach accessories without adding excessive weight
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 M-LOK Picatinny Rail, Black