Description
Transform your standard AR-15 lower into a dual-feed, sustained-fire powerhouse with the FightLite Industries MCR-556-DFR Upper Receiver Assembly. Engineered for ultimate versatility and mission-critical reliability, the MCR® (Mission-Configurable Rifle) system allows users to seamlessly switch between standard M4/AR-15 box magazines and M27-linked ammunition belts at will. Whether configured for heavy volume range sessions, tactical training, or defensive readiness, this upper delivers genuine light machine gun (LMG) capability without the need for a dedicated NFA lower receiver..
True Dual-Feed Capability
The defining feature of the MCR-556-DFR is its innovative patented dual-feed mechanism. Unlike specialized platforms that lock you into one feeding method, this system accepts standard AR-15 magazines directly through your existing lower receiver magwell or linked 5.56/.223 ammunition fed from a top-loading feed tray. This flexibility ensures you can adapt to available supply lines or changing course-of-fire requirements in seconds.
Sustained-Fire Engineering & Quick-Change Barrel
To handle the heat and friction of sustained high-volume fire, the MCR system features a quick-change barrel mechanism. With a simple press of the release lever, the barrel can be swapped out in seconds to prevent over-heating.
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Barrel Profile: 16.25" premium chrome-lined, hammer-forged barrel for long-lasting accuracy.
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Gas System: Robust, self-regulating push-rod piston operation that runs significantly cleaner and cooler than traditional direct impingement setups.
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Feed Tray: Precision-machined, heavy-duty steel feed tray engineered to guide M27 links flawlessly under rapid fire.
Drop-In AR-15 Compatibility
The MCR-556-DFR is designed as a direct, drop-in replacement upper that fits seamlessly onto any standard, mil-spec AR-15 lower receiver assembly. No permanent modifications to your lower are required. The package includes the necessary full-auto-profile bolt carrier group, a co-aligned top Picatinny rail for optics, and a rugged handguard equipped with mounting points for lights, lasers, or bipods.
