“Spikes STU5025R9S Complete Upper 5.56x45mm NATO 16″ Black Phosphate Barrel, 7075-T6 Aluminum Black Receiver, 9″ BAR2 Free-Float Handguard for M4 Carbine” has been added to your cart. View cart

HK 51000385 MR556 Upper Receiver Kit 5.56mm for AR15/M16/M4

SKU: SA1350907

UPC: 642230270220

$2,179.00

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HK 51000385 MR556 Upper Receiver Kit 5.56mm for AR15/M16/M4

Weight	9.025 lbs
Dimensions	31 × 16 × 4 in
Manufacturer	HK
Caliber	5.56mm
Compatibility	AR15/M16/M4
Model	kit
Platform	AR-15
Product Type	Complete Upper

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HK 51000385 MR556 Upper Receiver Kit 5.56mm for AR15/M16/M4

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