Heckler & Koch MR556 Upper Receiver Kit

Description: Heckler & Koch MR556 Upper Receiver. This Heckler & Koch Upper Receiver kit is manufactured for the MR556 rifles chambered in .223 Rem and 5.56x45mm. This kit includes a completed upper receiver with completed forward assist/barrel assembly, bolt carrier assembly, buffer and buffer spring allowing most high-quality 5.56mm AR-Style rifles to be retrofitted to HK's pusher rod system. Also included is a black tactical carrying case featuring PALS webbing and pouches with the HK logo on front center and an HK Free Floating Rail System (FFRS) handguard with its four MIL-STD-1913 "Picatinny" rails. This premium machined alloy handguard allows all current accessories such as sights, lights, and aimers to be fitted. This upper receiver kit is the core of the HK 5.56mm proprietary gas piston operating system.

** THIS PART HAS BEEN DISCONTINUED BY THE MANUFACTURER AND HAS BEEN REPLACED BY PART# 81000584 **

HK MR556A1 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).

Note: It is recommended that all H&K rifle parts be installed by a qualified gunsmith.

Manufacturer: Heckler and Koch

PRODUCT SPECIFICATIONS:

• Brand: Heckler and Koch
• Caliber: .223 Rem,5.56x45mm
• Finish / Color: Stainless Steel
• Firearm Type: Rifle
• Material: Stainless Steel
• Models Fit: Heckler and Koch MR556A1,AR-15