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Home / Gun Parts / Sons Of Liberty Gun Works / Sons of Liberty Gun Works M4-L89 5.56mm 14.5" Bbl Mid Gas L89 Rail P&W HUXWRX Mount Liberty Fighting Bbl & Mil-Spec Upper Receiver U-M4L89-556-145-HUX
Sons of Liberty Gun Works M4-L89 5.56mm 14.5" Bbl Mid Gas L89 Rail P&W HUXWRX Mount Liberty Fighting Bbl & Mil-Spec Upper Receiver U-M4L89-556-145-HUX

Sons of Liberty Gun Works M4-L89 5.56mm 14.5" Bbl Mid Gas L89 Rail P&W HUXWRX Mount Liberty Fighting Bbl & Mil-Spec Upper Receiver U-M4L89-556-145-HUX

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Updated
Jun 25, 2026
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Red Team Armory
Red Team Armory Best
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Scopelist
Scopelist
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$950
OpticsPlanet
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Code ARMSAGORA — 7% Off Most Items
$976.5
$1,050
EuroOptic
EuroOptic
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$1,050
13.75 L89 Handguard"
14.5 5.56 NATO Barrel"
7-Sided M-LOK Slots
Drivelock Barrel Nut System
HUXWRX Flash Hider
Integral QD's at Barrel Nut on Both Sides

Specifications

Caliber
5.56 NATO
Brand
Sons Of Liberty Gun Works
Model
M4-L89 Upper Receiver Group
MPN
U-M4L89-556-145-HUX
UPC
657628673019

Description

Sons of Liberty Gun Works M4-L89 5.56mm 14.5" Bbl Mid Gas L89 Rail P&W HUXWRX Mount Liberty Fighting Bbl & Mil-Spec Upper Receiver U-M4L89-556-145-HUX

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