NEW & UNFIRED is a Factory HK-MR556A1 Complete CQB Upper Receiver, New Production. Conversion by TDyer Gunsmith.

Barrel was Cut & Crowned to 10.4? and Threaded 1/2 X 28 by TDyer Gunsmith. Has a Factory German HK, 9?Inch HK416 T-Marked Quad Rail Hand Guard. Includes Factory Charging Handle, & Complete Factory MR556  Bolt Carrier Group and Factory Bird Cage Flash-Hider.  Factory Gas Block and Barrel Port were Relieved/Opened for Suppressed & Unsuppressed Cycling.

Test Fired in both Configurations by Terry Dyer Gunsmith Only, for Function.

Upper Receiver is a New Unfired & Unmolested. Includes a “Certificate of Authenticity” with Serial Number from TDyer Gunsmith for the conversion to 10.4?.

Ready for your Registered SBR Lower or Pistol Build.

ALL NFA RULES APPLY.