H&K MR556 Complete Upper Receiver Kit 235975A5 , 223 Rem/5.56 NATO, 16" 4140 Steel Black BBL, Black Finish, Upper Only

Product Description

This kit has been designed and manufactured to Heckler & Koch's exacting standards of excellence and is intended for use in, and with, MIL standard buffer tubes, as are provided with the HK MR556A1 rifle. Due to the precise nature of the components of this kit, they must be installed as a complete kit to ensure proper operation. The MR556A1 Upper Receiver Kit (URK) consists of an MR556A1 upper receiver/barrel assembly, complete bolt mechanism, and buffer and action (recoil) spring. The MR556A1 Upper Receiver Kit is designed to be fully interchangeable with most high quality AR-style firearms. MR556A1 upper receiver kits can be used to retrofit many non-HK AR systems by replacing the aforementioned components with MR556A1 URK components.

Please Note: This description may represent a general group of products. Please read the item's title and specifications for more specific information about this particular item.

Specifications

Type : A1 Upper Receiver Assembly
MFG/Model : 223 Remington/5.56 NATO
Style : None
Misc : 16"
Finish : 4140 Steel

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