M4-89 300 AAC BLACKOUT ASSEMBLED UPPER RECEIVER M489UPPER-13.9-300

M4-89 .300 AAC Blackout Assembled Upper Receiver 13.9" Barrel M489UPPER-13.9-300 M4-89 M4-89 300 AAC BLACKOUT ASSEMBLED UPPER RECEIVER M489UPPER-13.9-300—M4-89 M489UPPER-13.9-300 .300 AAC Blackout Assembled Upper Receiver Black Supreme Modular Supreme. M4-89 Upper Supreme. What is M489UPPER-13.9-300? The M4-89 M489UPPER-13.9-300 Assembled Upper Receiver for .300 AAC Blackout 13.9 Inch Barrel Supreme Complete Supreme supreme. Model M489UPPER-13.9-300; m4-89 300 blackout upper 13.9 assembled. Key Features of M4-89 Upper: Caliber: .300 AAC Blackout. Barrel Length: 13.9": Assembled Upper Receiver: Black Finish: M-LOK or Rail Compatible: Why Choose M489UPPER-13.9-300? Upper Supreme m489upper-13.9-300 m4-89. M489UPPER-13.9-300 300blk. Upper Supreme M489UPPER-13.9-300! Specifications: ModelM489UPPER-13.9-300 Caliber.300 AAC Blackout Barrel13.9" Assembled Upper StyleM4-89 Black Customer Reviews: "M489UPPER-13.9-300 blackout boom!" – AR Builder "13.9 tactical." – Suppressor Shooter "M4-89 mil-spec." – Upper Supreme Blackout Supreme M4-89 300 AAC BLACKOUT ASSEMBLED UPPER RECEIVER M489UPPER-13.9-300! The End