HK MR556 A4 5.56 NATO RIFLE 16.5″ | PATRIOT BROWN
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Description
HK MR556 A4 Features
HK MR556 A4 is a semi-automatic rifle built for shooters who want a premium 5.56 platform with piston-driven reliability and fully ambidextrous controls. It uses a short-stroke gas piston system, so it keeps fouling out of the action and supports cleaner operation over longer shooting sessions. Because this Patriot Brown variant pairs that system with a slimmer A4 profile, it offers a more refined setup for training, range use, and general-purpose rifle work.
The HK MR556 A4 also blends hard-use engineering with practical modern features. Its free-floating M-LOK handguard gives the rifle strong accessory flexibility, while the adjustable gas regulator lets shooters tune the rifle for suppressed or unsuppressed use. In addition, the cold hammer-forged barrel, threaded muzzle, and fully ambidextrous controls reinforce the rifle’s serious-duty role. The Patriot Brown receiver finish further gives it a more distinctive look without changing the platform’s purpose-driven feel. As a result, it stands out for buyers who want a factory-built 5.56 rifle with premium HK design and a cleaner-running operating system.
Specifications
Manufacturer: Heckler & Koch
Model: MR556 A4
Operating System: Short-Stroke Gas Piston
Controls: Fully Ambidextrous
Handguard Type: Free-Floating M-LOK
Gas System: Adjustable Gas Regulator
Barrel Type: Cold Hammer-Forged
Additional Notable Specs: 1:7 twist, threaded muzzle, 6-position stock, Patriot Brown receiver finish
Specifications
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