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Sons of Liberty Gun Works is a manufacturer of quality firearms and parts, perfect for your next build, next competition, or next line of defense. Their small parts fit most mil-spec firearms. These uppers are built with L89 7-sided rails, forged uppers, and Liberty Fighting Barrels. There are multiple options of lengths and muzzle devices.
| UPC | 657628673026 |
|---|---|
| Manufacturer | Sons of Liberty Gun Works |
| Manufacturer Part Number | U-M4L89-556-145-ASR |
| Barrel Length | 14.5" Pinned (16" OAL) |
| Caliber/Gauge | .223 REM/5.56 NATO |
| Color | Black |
| Model | M4-L89 Upper Receiver Group |
| Product Type | Upper |
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