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SIONICS M4 Upper Receiver – Assembled


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UPC: N/A SKU: M4URAS Category: Product ID: 2399


SIONICS Weapon Systems M4 Upper Receiver

Material: Forged 7075-T6
Features: M4 Feed Ramps – Dry Film Lubricated – Engraved T-Markings (Color Filled)

Ejection Port Cover and Forward Assist Installed


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