FightLite MCR Dual-Feed Upper — 5.56 NATO, 12.5″ Barrel

The FightLite Industries MCR Dual-Feed Upper Assembly is a drop-on, MIL-Spec compatible AR/M4 upper designed to fit standard MIL-Spec lowers without permanent modification. It is built around a 12.5" quick-change barrel and offers dual-feed capability to accept AR-15 magazines or M27 linked ammunition. The design incorporates short-stroke gas-piston operation and dry film lubrication on high-friction surfaces for enhanced reliability in adverse conditions.

Key Specifications

• The cartridge is .223 Rem / 5.56 NATO.
• The barrel measures 12.50" and is configured as a quick-change system.
• The twist rate is 1:7.
• The muzzle threading is 1/2-28.
• The handguard style is a MIL-STD 1913 rail for mounting optics and accessories.
• The upper receiver and related components are precision machined from 7075-T6 billet aluminum.
• The operating system is a short-stroke gas piston.
• The finish uses manganese phosphate and Type III, Class 2 hardcoat anodize in black.
• Included accessories include 100 M27 links plus a mag adapter and other listed items.
• The unit ships in black and fits AR-15 / MIL-Spec lowers.

Configured for adaptability, the MCR Dual-Feed upper converts a compatible lower into a versatile platform that supports quick-barrel changes and selectable feed options without permanent alteration to the host rifle. Its combination of a short-stroke piston system, robust materials, and MIL-STD rail interface make it suitable for users who require a durable, configurable upper for carbine or light support roles.