HK MR556 A4 5.56x45mm/223 Rem 30+1 16.5" Barrel M-LOK Handguard Black Stock

Overview:

The HK MR556 A4 is a top-tier tactical rifle chambered in 5.56 NATO/.223 Rem, built for durability, accuracy, and dependability. With its 16.5" cold hammer-forged barrel, gas piston operating system, and ambidextrous controls, the MR556 A4 is an ideal platform for tactical operations, training, or high-performance shooting. Engineered by Heckler & Koch to military standards, this rifle is optimized for both reliability and precision.

Key Features:

• 5.56x45mm NATO / .223 Rem – Dual caliber versatility for a wide range of applications
• 16.5" Threaded Barrel – Perfect balance of accuracy and maneuverability
• Short-Stroke Gas Piston – Cleaner, more reliable operation compared to direct impingement
• 30+1 Capacity – High-capacity magazine for sustained firepower
• M-LOK Handguard – Modular, lightweight, and customizable for accessories
• Ambidextrous Controls – Includes safety, mag release, and bolt catch for left and right-handed users
• Picatinny Top Rail – Ready for optics, sights, or other attachments

Specifications:

• Caliber: 5.56x45mm NATO / .223 Rem
• Action: Semi-Auto, Gas Piston
• Capacity: 30+1
• Barrel Length: 16.5"
• Barrel Description: Threaded, Cold Hammer Forged, 1:7” Twist
• Thread Pattern: 5/8"x24
• OAL: 36.50"
• Weight: 7.67 lbs
• Receiver: Picatinny Rail, Black Finish
• Stock Description: 6 Position (Adjustable)
• Stock Material/Finish: Synthetic / Black
• Grip: Black Polymer
• Sights: None (Optics Ready)
• Safety: Ambidextrous Safety Lever
• Trigger Pull: 4.50–5.60 lbs
• Grooves: 6
• Handguard: Free-Float M-LOK
• Height: 7.50"
• Width: 3.07"
  
  Applications:
• Tactical Operations – Ideal for military or law enforcement applications due to its robust design and ambidextrous controls
• Personal Defense & Home Defense – The versatility and reliability of the MR556 make it an excellent choice for home defense or personal use
• Competitive Shooting – Precision engineered for competitive shooters requiring consistent performance
• Training Platforms – Suitable for military and law enforcement training with its accuracy and handling features
• Custom AR Builds – Ideal base for custom upgrades and modifications

Additional Features:

• Proprietary HK Gas Piston System – Increases reliability and reduces fouling, making it perfect for prolonged firing
• Cold Hammer Forged Barrel – Maximizes barrel lifespan and accuracy
• Modular Platform – Easily adaptable with various AR-style components
• Picatinny Rail System – Ready for your choice of optics, lights, or other accessories
• Precision Machined Receiver – Exceptional durability and fit, standard in HK rifles

MPN: 81000827
UPC: 642230269408

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