FightLite MCR DUAL-FEED Upper | 5.56 NATO | 12.5″ | MCR556DFRS

The FightLite MCR DUAL-FEED upper assembly is a drop-in, MIL-Spec compatible upgrade for AR-15/M4 type lower receivers. It is configured for .223 REM/5.56 NATO and offers a 12.5-inch quick-change barrel and short-stroke gas-piston operation intended for reliable operation in adverse conditions. The patented MCR platform accepts standard AR-15/M16 magazines or M27 linked ammunition and uses a MIL-STD 1913 co-planar handguard for mounting optics and accessories. Typical applications include range training and designated support-role or tactical training for qualified professionals.

Product Specifications

• The cartridge is listed as .223 REM/5.56 NATO.
• The barrel length is 12.50 inches and is a quick-change design.
• The rate of twist is 1:7.
• The muzzle thread is 1/2-28.
• The upper uses short-stroke gas piston operation.
• The handguard style is a MIL-STD 1913 rail for accessory mounting.
• The finish is listed as manganese phosphate & Type III Class 2 hardcoat anodize (black).
• The receiver is described as 7075-T6 billet aluminum with a billet steel feed tray.
• The product is described as dual-feed and accepts AR-15/M16 magazines & M27 linked ammunition.
• The included accessories list contains 100 M27 links plus a belt-feed main action spring, MIL-Spec H3 buffer, carbine stock spacer, extended bolt catch, mag adapter, and RIP Brake muzzle compensator.
• The sights are listed as adjustable.
• The listed overall length is 25.5 inches.
• The listed weight is 18 (source did not specify units for this value).
• The manufacturer/part reference present in the source data is MCR556DFRS.
• The UPC is 850017078017.

The MCR dual-feed upper is a functional, modular option for shooters who need an AR-compatible upper that moves between magazine-fed and linked-ammo configurations. Its quick-change barrel and MIL-STD rail interface make it straightforward to configure for optics and mission-specific accessories while preserving MIL-Spec lower compatibility. If you require a convertible upper that emphasizes interchangeability and serviceable materials, this assembly delivers those core capabilities.