HK MR556 UPPER RECEIVER KIT 16.5" MEDIUM CONTOUR M-LOK
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product code:HK 81000584
UPC:642230262607
Brand:HK
availability: In stock
Note: This product must be shipped to an Federal Firearms Licensed Dealer(FFL Dealer)
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. - 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
