The Sons of Liberty Gun Works SOLGW M4-L89 URG 14.5" 5.56 P/W HUX is a complete upper receiver group built around the proven Liberty Fighting Barrel and L89 free-float rail. This assembled upper uses a forged receiver, a 14.5" barrel with a pinned and welded HUXWRX flash hider to reach 16" overall length, and a 13.75" L89 handguard with 7-sided M-LOK slots for modern accessory mounting.

This upper is ideal for shooters who want a dependable AR-15 top end for training, range work, or general-purpose defensive use. The mid-length gas system, chrome-lined .223 Wylde/5.56 NATO Liberty Fighting Barrel, and Drivelock barrel nut system are designed to deliver smooth operation and consistent accuracy. Sons of Liberty Gun Works is known for careful assembly, quality components, and attention to detail throughout their rifle and upper receiver line.

Key Features:

• Manufacturer: Sons of Liberty Gun Works
• Model: M4-L89 Upper Receiver Group
• Caliber: .223 Wylde / 5.56 NATO
• Barrel Length: 14.5" with pinned and welded HUXWRX flash hider (16" OAL)
• Gas System: Mid-length
• Rail System: 13.75" L89 7-sided M-LOK with integral QD mounts
• Upper Receiver: Forged, complete upper (no BCG or charging handle)
• Flash Hider: Pinned and welded HUXWRX