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    Item #: AAC102129

    Advanced Armament 300 AAC Blackout 12.5 Inch Upper Receiver Assembly

    Shop Advanced Armament 300 AAC Blackout 12.5 Inch Upper Receiver Assembly at MacksPW.com - The hunt begins here. Fast shipping, great prices & large selection at America’s Premier Waterfowl Outfitter!
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    Product Description


    Advanced Armament 300 AAC Blackout 12.5 Inch Upper Receiver Assembly is designed for use with a carbine receiver extension, standard GI Buffer Spring and an H2 Buffer. Ready to drop onto your AR15/M16/M4 lower! Works with an AR lower with Mil-Spec push pin locations.

    Advanced Armament 300 AAC Blackout 12.5 Inch Upper Receiver Assembly Specifications:

    • 12.5 inch Nitrided 1:7" Twist Barrel, threaded 5/8-24
    • AAC 51T BLACKOUT Flash Hider
    • Full Auto BCG - KAC URX Rail

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    "An excellent site with great information and they informed me when the products I wanted came into stock as they said they would." Feb 2016
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