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This is the Advanced Armament Corp. Complete 300 BLACKOUT 9" Upper Receiver Assembly. 9" Nitrided 1:7: Twist Barrel, threaded 5/8-24. AAC 51T BLACKOUT™ Flash Hider. "Full Auto" BCG. KAC URX Rail. Ready to drop onto your AR15/M16/M4 lower! Works with an AR lower with "Mil-Spec" push pin locations. With barrels shorter than 16", all NFA rules apply.
NFA Disclaimer - All NFA/ATF Rules Apply
Possession of this upper along with a Non-NFA Lower is prohibited, except when installed on a Pistol configuration firearm. You may not install this upper on a lower receiver unless it is a Registered SBR, Machine Gun, or Pistol Lower. This upper receiver is a regulated item by the National Firearms Act (NFA). Please check with your local and state municipalities for any further regulatory requirements. It is the buyer’s responsibility to make sure they comply with all NFA rules and applicable laws.
*Copy of Photo ID required for purchase of any uppers.
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