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HK MR556 A4 Short-Stroke Piston 5.56 NATO 16.5" - AR-15 Rifle

Name: HK MR556 A4 Short-Stroke Piston 5.56 NATO 16.5" - AR-15 Rifle
Brand: Heckler & Koch
SKU: retailer_offer:primaryarms.com:81000827

Lowest Listed Price

$3,749

MSRP

$3,749

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Updated

Aug 26, 2026

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HK MR556 A4 Short-Stroke Piston 5.56 NATO 16.5" - AR-15 Rifle