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NEW & UNFIRED & EXCELLENT CONDITION is a Factory HK-MR556A1 Complete Upper Receiver. Factory 16″ Barrel was Cut and Crowned to 10.4″ and Threaded 1/2 X 28 by TDyer Gunsmith. Includes a New 9″ Factory HK MLOK Hand Guard, Charging Handle, & Complete Bolt Carrier Group. Gas Port was Relieved/Opened for Suppressed & Unsuppressed Cycling. Test Fired in both Configuration by TDyer Gunsmith only for Function. Upper Receiver was a New Unfired Fresh Take-off prior to being Converted.
Ready for your SBR or Pistol Build.
ALL NFA RULES APPLY.