For Sale: H&K MR556 Upper Receiver for AR15 235975-A5 NEW in Chicago, Illinois For Sale

PRICE REDUCED $xxxx OR BEST OFFER
MR556 Upper Receiver Kit [xxxx75-A5]
The MR556A1 Upper Receiver Kit includes a complete upper receiver/barrel assembly, bolt carrier assembly, buffer, and buffer spring allowing most high-quality 5.56 mm AR-style rifles to be retrofitted to HK?s pusher rod system. The Upper Receiver Kit is the core of the HK 5.56 mm proprietary gas piston operating system. It employs a piston and a solid operating ?pusher? rod in place of the gas tube normally found in AR15/M16/M4-style firearms.
HK MR556 Upper kit includes:
- Complete MR556 Upper Receiver/Barrel Assembly? HK 16.5 inch cold-hammer forged barrel, upper receiver with forward assist, extended convertible charging handle, HK Free Floating Rail System handguard
- Complete MR556 Bolt Group Assembly
- Tungsten Filled HK Proprietary Buffer
- HK Proprietary Buffer (Action) Spring
NOTE: The MR556A1 Upper Receiver Kit is not classified as a firearm and can be purchased without a Federal Firearms License ( FFL).