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H&K MR556 A4 16.5in Upper Receiver Kit (51000384)

Name: H&K MR556 A4 16.5in Upper Receiver Kit (51000384)
Brand: Heckler and Koch
SKU: retailer_offer:gritrsports.com:HECK-51000384
Availability: OutOfStock

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$1,994.99

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Updated

Jun 19, 2026

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Brand

Heckler and Koch

Description

Shop H&K MR556 A4 16.5in Upper Receiver Kit (51000384). Buy best AR Uppers from gritrsports.com | Reviews and Shipping options available

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H&K MR556 A4 16.5in Upper Receiver Kit (51000384)

Specifications

Description

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