HK MR556 5.56mm NATO 16.5in Black Semi-Automatic Modern Sporting Rifle – 30+1 Rounds

The HK MR556 5.56mm NATO 16.5in Black is a civilian version of the legendary HK416, designed to provide unmatched accuracy, durability, and reliability for tactical enthusiasts, competitive shooters, and home defense users. The MR556A1 features a 16.5-inch cold hammer-forged barrel made from the same grade steel used in cannon barrels, delivering exceptional precision and long service life.

Advanced Cold Hammer Forged Barrel

HK’s renowned cold hammer forging process produces a thick, heavy contour barrel with a slightly smaller internal diameter at the muzzle than at the chamber end. This design enhances bullet velocity, improves accuracy, and ensures consistent performance over thousands of rounds. The MR556A1’s barrel is engineered for long-range accuracy, making it ideal for target shooting, tactical training, and range practice.

Durability and Precision

The MR556A1 is built with high-quality materials and superior HK engineering to handle demanding conditions. Its semi-automatic gas piston system reduces fouling in the receiver and minimizes wear on critical components, ensuring reliable operation under extended use. The rifle is also optics-ready, allowing shooters to mount scopes, red dot sights, or other tactical optics for enhanced target acquisition.

Features and Performance of HK MR556 5.56mm NATO 16.5in Black

• 16.5-inch cold hammer-forged barrel for superior accuracy and long service life
• 30+1 round magazine for extended shooting sessions
• Black polymer pistol grip for ergonomic handling and control
• Optics-ready upper receiver compatible with most tactical scopes and red dot sights
• Twist rate 1:7in optimized for 5.56mm NATO ammunition
• Semi-automatic action for reliable cycling and smooth shooting
• Durable black finish to withstand harsh environmental conditions
• HK MR556 5.56mm NATO 16.5in Black

Specifications

Why Choose the HK MR556 5.56mm NATO?

The HK MR556A1 is the ultimate choice for shooters looking for a high-quality, civilian-legal semi-automatic rifle with the legendary performance and reliability of the HK416. Its combination of a cold hammer-forged barrel, 30-round magazine, polymer grip, and optics-ready upper receiver makes it perfect for competitive shooting, tactical training, home defense, and recreational range use. Experience the precision, durability, and engineering excellence that only Heckler & Koch delivers with the MR556 5.56mm NATO rifle.