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Fightlite
The Fightlite MCR Dual Feed Upper with M-LOK is a drop-in complete upper receiver assembly that transforms a standard AR15, M16, or M4 lower into a mission-configurable platform. Built around short-stroke gas piston operation and a quick-change barrel system, this 16.25-inch upper delivers the reliability and adaptability that serious shooters and professionals demand—without requiring any permanent modification to your existing lower receiver.
What sets the MCR apart is its genuine dual-feed capability: run standard AR15/M16 box magazines for traditional shooting, or switch to M27 linked ammunition for sustained firepower scenarios. The barrel swaps in seconds using the quick-change handle, and the entire upper configures for different mission profiles without tools. The 7075-T6 billet upper receiver, precision-machined steel feed tray, and full-auto bolt carrier are engineered for extreme reliability in harsh conditions. The MIL-STD 1913 rail at 12 o'clock pairs with M-LOK slots at the 3, 6, and 9 positions, giving you flexible mounting for optics and modern accessories on a co-planar handguard.
This is genuine American manufacturing—machined and finished with manganese phosphate and Type III Class 2 hardcoat anodize in black. The upper accepts 5.56x45mm NATO with a 1:7 right-hand twist barrel, and it's backward compatible to AR platform lowers dating back to 1963. Whether you're running it as an optic-ready carbine or a lightweight support rifle, the MCR gives you the flexibility to adapt without buying multiple guns.
| Caliber | 5.56x45mm NATO |
| Barrel Length | 16.25 inches |
| Barrel Twist | 1:7 RHT |
| Gas System | Short-stroke gas piston |
| Upper Receiver Material | 7075-T6 billet aluminum |
| Feed Tray Material | Precision-machined billet steel |
| Bolt Carrier | Full-auto rated |
| Handguard Style | M-LOK (3, 6, 9 o'clock) with MIL-STD 1913 rail at 12 o'clock |
| Finish | Manganese phosphate and Type III Class 2 hardcoat anodize, black |
| Compatibility | AR15, M16, M4 type lower receivers (MIL-Spec); backward compatible to 1963 and later |
| Country of Origin | USA |
Yes. This is a drop-in upper assembly that works with any MIL-Spec AR15, M16, or M4 type lower receiver—including models going back to 1963—without any permanent modification. Simply remove your old upper and install the MCR.
The MCR is chambered in 5.56x45mm NATO. Its dual-feed design lets you run either standard AR15/M16 box magazines or M27 linked ammunition, giving you flexibility depending on your mission and magazine availability.
Yes. The MCR features a quick-change barrel system with a dedicated handle that allows barrel swaps in approximately 3 seconds without tools—making it practical to adapt for different roles.
The upper ships with an adjustable sight set, quick-change barrel handle, main action spring, bolt catch, carbine stock spacer, 100 M27 ammunition links, and an operator's manual.
Fightlite
The Fightlite MCR Dual Feed Upper with M-LOK is a drop-in complete upper receiver assembly that transforms a standard AR15, M16, or M4 lower into a mission-configurable platform. Built around short-stroke gas piston operation and a quick-change barrel system, this 16.25-inch upper delivers the reliability and adaptability that serious shooters and professionals demand—without requiring any permanent modification to your existing lower receiver.
What sets the MCR apart is its genuine dual-feed capability: run standard AR15/M16 box magazines for traditional shooting, or switch to M27 linked ammunition for sustained firepower scenarios. The barrel swaps in seconds using the quick-change handle, and the entire upper configures for different mission profiles without tools. The 7075-T6 billet upper receiver, precision-machined steel feed tray, and full-auto bolt carrier are engineered for extreme reliability in harsh conditions. The MIL-STD 1913 rail at 12 o'clock pairs with M-LOK slots at the 3, 6, and 9 positions, giving you flexible mounting for optics and modern accessories on a co-planar handguard.
This is genuine American manufacturing—machined and finished with manganese phosphate and Type III Class 2 hardcoat anodize in black. The upper accepts 5.56x45mm NATO with a 1:7 right-hand twist barrel, and it's backward compatible to AR platform lowers dating back to 1963. Whether you're running it as an optic-ready carbine or a lightweight support rifle, the MCR gives you the flexibility to adapt without buying multiple guns.
| Caliber | 5.56x45mm NATO |
| Barrel Length | 16.25 inches |
| Barrel Twist | 1:7 RHT |
| Gas System | Short-stroke gas piston |
| Upper Receiver Material | 7075-T6 billet aluminum |
| Feed Tray Material | Precision-machined billet steel |
| Bolt Carrier | Full-auto rated |
| Handguard Style | M-LOK (3, 6, 9 o'clock) with MIL-STD 1913 rail at 12 o'clock |
| Finish | Manganese phosphate and Type III Class 2 hardcoat anodize, black |
| Compatibility | AR15, M16, M4 type lower receivers (MIL-Spec); backward compatible to 1963 and later |
| Country of Origin | USA |
Yes. This is a drop-in upper assembly that works with any MIL-Spec AR15, M16, or M4 type lower receiver—including models going back to 1963—without any permanent modification. Simply remove your old upper and install the MCR.
The MCR is chambered in 5.56x45mm NATO. Its dual-feed design lets you run either standard AR15/M16 box magazines or M27 linked ammunition, giving you flexibility depending on your mission and magazine availability.
Yes. The MCR features a quick-change barrel system with a dedicated handle that allows barrel swaps in approximately 3 seconds without tools—making it practical to adapt for different roles.
The upper ships with an adjustable sight set, quick-change barrel handle, main action spring, bolt catch, carbine stock spacer, 100 M27 ammunition links, and an operator's manual.
