Hk Upper Mr556a4 5.56 16.5" Blk

Introducing the HK Upper MR556A4 5.56 16.5" Black – a precision-engineered upper receiver designed to elevate your AR platform’s performance to professional standards. Crafted by Heckler & Koch, this upper combines military-grade durability with cutting-edge technology, making it ideal for tactical applications and serious shooting enthusiasts. Featuring a 16.5-inch barrel optimized for the versatile 5.56 NATO cartridge, the MR556A4 delivers reliable accuracy and consistent cycling in a lightweight, durable package. Whether upgrading your current build or assembling a new rifle, this upper receiver offers seamless integration and superior functionality. **Key Features and Benefits:** - **High-Quality 16.5" Barrel:** Chrome-lined, cold hammer-forged barrel designed for enhanced accuracy, increased barrel life, and superior resistance to corrosion. - **5.56 NATO Chambering:** Optimized for standard NATO ammunition, providing reliable feeding and cycling for both civilian and tactical use. - **Robust Black Finish:** Corrosion-resistant black hard coat anodizing ensures durability and maintains an aggressive tactical aesthetic. - **M-LOK Compatible Handguard:** Lightweight, modular handguard allowing for easy mounting of accessories, improving versatility without added weight. - **HK Reliability:** Manufactured by Heckler & Koch to meet rigorous military specifications, delivering unmatched reliability and performance under all conditions.

Specification	Details
Manufacturer	Heckler & Koch (HK)
Model	MR556A4
Caliber	5.56 NATO
Barrel Length	16.5 inches
Finish	Black Hard Coat Anodized
Handguard	M-LOK Compatible
UPC	642230270213
MPN	51000384

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