Fightlite152744729
Fight Raptor Upr 556 Mlok 16.25$4,799.99
Availability: In Stock
The Fightlite MCR dual-feed upper receiver for 5.56 NATO is a drop-on conversion that transforms your AR-15, M16, or M4 lower receiver into a radically more capable platform. This complete upper assembly pairs a short-stroke gas-piston design with the ability to feed from standard AR magazines or M27 linked ammunition—a genuine dual-feed system that gives you the firepower flexibility of a support rifle in a configurable carbine format. The 16.25-inch quick-change barrel system swaps in seconds without tools, and the precision-machined billet upper receiver in manganese phosphate and Type III hardcoat anodize is built for durability in hard use.
The MCR upper accepts any standard AR15/M16 lower without permanent modification and is backward compatible with receivers dating back to 1963. The short-stroke piston system delivers reliable function in adverse conditions—no direct impingement, no carrier tilt, just proven mechanical reliability. It ships ready to upgrade with a full-auto bolt carrier, adjustable sight set, MIL-STD 1913 railed handguard for optics and accessories, quick-change barrel handle, and 100 rounds of M27 linked ammunition to get you running immediately.
This is purpose-built for shooters and armed professionals who need a rifle that adapts to the mission, not the other way around. Whether you're running it as a carbine with box magazines or linking up belt-fed ammunition for extended firepower, the MCR upper handles both without reconfiguration. Made in the USA and finished in black, it's a serious upgrade from stock AR hardware.
| Caliber | 5.56 x 45mm NATO |
| Barrel Length | 16.25 inches |
| Barrel Twist | 1:7 RHT |
| Barrel Threading | 5/8–28 TPI |
| Gas System | Short-stroke gas piston |
| Feed System | Dual-feed (AR15/M16 box magazines or M27 linked ammunition) |
| Upper Receiver Material | 7075-T6 billet aluminum |
| Feed Tray Material | Billet steel |
| Handguard Style | MIL-STD 1913 rail |
| Finish | Manganese phosphate & Type III Class 2 hardcoat anodize (black) |
| Bolt Carrier | Full-auto |
| Compatibility | AR-15/M16/M4 lower receivers; backward compatible to 1963 models |
| Barrel Change Time | 3 seconds (no tools required) |
| Manufacturer | Fightlite (USA) |
The MCR upper is a drop-on assembly that works with any standard MIL-Spec AR-15, M16, or M4 lower receiver without permanent modification. It's also backward compatible with AR receivers made as far back as 1963.
Yes. The dual-feed system accepts both standard AR-15/M16 box magazines and M27 linked ammunition, giving you flexibility depending on your mission profile and firepower needs.
The 16.25-inch quick-change barrel system swaps in approximately 3 seconds and requires no tools. The quick-change barrel handle is included.
The upper ships with a full-auto bolt carrier, adjustable sight set, quick-change barrel handle, 100 rounds of M27 linked ammunition, a carbine stock spacer, and the operator's manual.
SKU: 152742689 • Width: 14.25in • Height: 6.5in • Depth: 36.75in • Weight: 18.63oz
Availability: In Stock
The Fightlite MCR dual-feed upper receiver for 5.56 NATO is a drop-on conversion that transforms your AR-15, M16, or M4 lower receiver into a radically more capable platform. This complete upper assembly pairs a short-stroke gas-piston design with the ability to feed from standard AR magazines or M27 linked ammunition—a genuine dual-feed system that gives you the firepower flexibility of a support rifle in a configurable carbine format. The 16.25-inch quick-change barrel system swaps in seconds without tools, and the precision-machined billet upper receiver in manganese phosphate and Type III hardcoat anodize is built for durability in hard use.
The MCR upper accepts any standard AR15/M16 lower without permanent modification and is backward compatible with receivers dating back to 1963. The short-stroke piston system delivers reliable function in adverse conditions—no direct impingement, no carrier tilt, just proven mechanical reliability. It ships ready to upgrade with a full-auto bolt carrier, adjustable sight set, MIL-STD 1913 railed handguard for optics and accessories, quick-change barrel handle, and 100 rounds of M27 linked ammunition to get you running immediately.
This is purpose-built for shooters and armed professionals who need a rifle that adapts to the mission, not the other way around. Whether you're running it as a carbine with box magazines or linking up belt-fed ammunition for extended firepower, the MCR upper handles both without reconfiguration. Made in the USA and finished in black, it's a serious upgrade from stock AR hardware.
| Caliber | 5.56 x 45mm NATO |
| Barrel Length | 16.25 inches |
| Barrel Twist | 1:7 RHT |
| Barrel Threading | 5/8–28 TPI |
| Gas System | Short-stroke gas piston |
| Feed System | Dual-feed (AR15/M16 box magazines or M27 linked ammunition) |
| Upper Receiver Material | 7075-T6 billet aluminum |
| Feed Tray Material | Billet steel |
| Handguard Style | MIL-STD 1913 rail |
| Finish | Manganese phosphate & Type III Class 2 hardcoat anodize (black) |
| Bolt Carrier | Full-auto |
| Compatibility | AR-15/M16/M4 lower receivers; backward compatible to 1963 models |
| Barrel Change Time | 3 seconds (no tools required) |
| Manufacturer | Fightlite (USA) |
The MCR upper is a drop-on assembly that works with any standard MIL-Spec AR-15, M16, or M4 lower receiver without permanent modification. It's also backward compatible with AR receivers made as far back as 1963.
Yes. The dual-feed system accepts both standard AR-15/M16 box magazines and M27 linked ammunition, giving you flexibility depending on your mission profile and firepower needs.
The 16.25-inch quick-change barrel system swaps in approximately 3 seconds and requires no tools. The quick-change barrel handle is included.
The upper ships with a full-auto bolt carrier, adjustable sight set, quick-change barrel handle, 100 rounds of M27 linked ammunition, a carbine stock spacer, and the operator's manual.
SKU: 152742689 • Width: 14.25in • Height: 6.5in • Depth: 36.75in • Weight: 18.63oz