HK MR556 5.56mm NATO 16.5in For Sale – 30+1 Rounds Rifle

The HK MR556 5.56mm NATO 16.5in For Sale rifle delivers unmatched tactical performance, precision, and reliability for civilian shooters. As a direct descendant of the legendary HK416, this semi-automatic rifle is designed for home defense, tactical training, competitive shooting, and recreational marksmanship. With a 16.5-inch cold hammer-forged barrel and a 30+1 round magazine, the MR556A1 allows you to shoot more while reloading less, making it perfect for extended range sessions.

HK Gas Piston System for Reliability

The MR556A1 uses HK’s proprietary gas piston system with a solid operating “pusher” rod, which virtually eliminates malfunctions commonly seen in direct impingement rifles. By keeping hot carbon fouling and waste gases out of the receiver, the MR556A1 ensures smoother cycling, reduced wear on components, and consistent performance in every shooting scenario. The free-floating HK Modular Rail System (MRS) allows for maximum accuracy and versatility when mounting optics, tactical lights, or other accessories.

Precision and Modularity of HK MR556 5.56mm NATO 16.5in For Sale

• 16.5-inch cold hammer-forged barrel made from high-quality German steel for superior accuracy and long service life
• One 30-round magazine included for extended shooting without frequent reloads
• 9-inch MRS handguard with ergonomic design and HK proprietary keyhole system for modular rail attachment
• Top-mounted Picatinny rail machined into the upper receiver for optics and mechanical sights
• Flip-up front and rear Troy Microsights for quick target acquisition
• Black polymer pistol grip for enhanced handling and control
• Fully compatible with major AR-style subassemblies and accessories

Specifications

Why Choose the HK MR556 5.56mm NATO 16.5in For Sale?

The HK MR556 16.5-inch semi-automatic rifle is ideal for shooters who demand tactical reliability, precision, and top-tier HK engineering. Whether you are training at the range, engaging in competitive shooting, or preparing for home defense scenarios, the MR556A1 offers unmatched versatility and performance. Its combination of cold hammer-forged barrel, gas piston system, free-floating MRS handguard, and 30-round magazine ensures superior accuracy, control, and endurance for extended sessions.

Enhance your shooting experience with the HK MR556 5.56mm NATO rifle and enjoy the legendary reliability, modularity, and performance only Heckler & Koch can deliver.