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Code: 40W-URC-8IU-U-M4L89-556-145-HUX
MPN: U-M4L89-556-145-HUX
UPC: 657628673019
The Sons of Liberty Gun Works L89 Upper Receiver Groups are built using our forged upper receiver, Liberty Fighting Barrels with SOLGW 4140 gas block and nitrided gas tube. These uppers are built to the same standards as our legendary rifles, and are test fired before leaving the shop. The L89 rails have 7-sided MLOK slots, with integral QDs at the barrel nut on the left and right side. The L89 features the Drivelock barrel nut system, anti-rotation tabs and an internal dowel pin between the upper/rail to all ensure a solid lockup, with minimal POI shifts for attached laser or other VAS systems.![]()
| Manufacturer: | Sons of Liberty Gun Works |
| Caliber: | .223 Wylde |
| Barrel Length: | 14.5 in |
| Barrel Profile: | Medium |
| Gas System Length: | Mid Length |
| Barrel Twist Rate: | 1-7 |
| Firearms Threads Per Inch: | 1/2x28 |
| Muzzle Device: | HUX |
| Finish: | Anodized |
| Color: | Black |
| Fabric/Material: | 416 Stainless Steel |
| Handguard Length: | 13.75 in |
| Gun Rail: | M-LOK |
| Gun Make: | AR Platform |
| Gun Model: | AR-15 |
| Bolt Carrier Group Included: | No |
| Charging Handle Included: | No |