Home / AR Parts / Sons Of Liberty Gun Works / Sons of Liberty Gun Works M4-L89 5.56mm 12.5" Bbl Car Gas L89 Rail A2FH Liberty Fighting Bbl & Mil-Spec Upper Receiver U-M4L89-556-125-A2
Sons of Liberty Gun Works M4-L89 5.56 12.5" Upper Receiver Group
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["12.5 5.56 NATO Barrel\"","11.75 L89 Handguard\"","A2 Flash Hider","7-Sided M-LOK Slots","Integral QD's at Barrel Nut on Both Sides","Drivelock Barrel Nut System"]
Specifications
Caliber
MPN
U-M4L89-556-125-A2
UPC
657628672982
MSRP
$950
Barrel Length
12.5"
Finish
Matte
Fits
AR-15
Color
Black
Description
The Sons of Liberty Gun Works Broadsword Billet/L89A Upper Receiver is a specialized precision assembly that combines the extreme rigidity of the Broadsword billet receiver with the enhanced tripod-ready features of the L89A handguard. This upper features a 14.5-inch Precision SPR 416R stainless steel barrel with three-groove polygonal rifling, optimized for high-accuracy performance with both 5.56 NATO and .223 Remington match ammunition. To ensure standard rifle compliance, the Huxwrx Flash Hider is permanently pinned and welded (P& W), providing a legal 16-inch overall barrel length while serving as a rock-solid host for Flow-series suppressors. The integrated ARCA rail on the base of the handguard ensures instant, secure mounting to tripods, making it a premier choice for precision shooters who value mobility and zero retention. Sons of Liberty Gun Works M4-L89 5.56mm 12.5" Bbl Car Gas L89 Rail A2FH Liberty Fighting Bbl & Mil-Spec Upper Receiver U-M4L89-556-125-A2
