HK UPPER RECEIVER KIT MR556A4 16.5"
Heckler & Koch
Overview
The HK UPPER RECEIVER KIT MR556A4 16.5" is a upper receiver. Compare prices from multiple merchants and find the best deal.
Specifications
Available Merchants(5)
Prices checked
Price Alert
Build history on GunPartPicker
Builders on GunPartPicker first added the HK UPPER RECEIVER KIT MR556A4 16.5" to a build in October 2026.
Today 2 of the 5 retailers we track have it in stock. Buying today, the lowest price is $2,179 at Optics Planet.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
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