Home / AR Parts / Sons Of Liberty Gun Works / M4-89 5.56x45 Nato Assembled Upper Receiver - M4-89 5.56x45 Nato 13.7'''' Bbl 13'''' M89 Rail W/Nox Brake
Sons of Liberty Gun Works M4-89 5.56x45 NATO 13.7" Assembled Upper Receiver
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Specifications
Caliber
Model
MPN
M489UPPER-13.7-556-B
Action
Semi-Auto
Barrel Length
13.7"
Fits
AR-15 mil-spec
Platform
AR-15
Gauge/Chamber
5.56x45mm NATO
Description
The SOLGW M4-89 Upper Half comes with SOLGW's Combat Barrel and M89 Rail, and is available in 12.5" and 13.7" 5.56, with A2, NOX or ASR muzzle devices. No BCG or C/H *13.7" barrels come pinned and welded flash hiders for OAL of 16"* Mfg: Sons Of Liberty Gun Works