Heckler & Koch MR556A1 – Military-Grade Performance in a Civilian Rifle
The Heckler & Koch MR556A1 Series is a semi-automatic, civilian-legal variant of the legendary HK416, offering unmatched reliability, accuracy, and durability. Built to military specifications, this gas-piston-driven rifle delivers superior function in extreme conditions, making it an ideal platform for tactical shooters, law enforcement professionals, and enthusiasts seeking a premium AR-style rifle.
Featuring HK’s proprietary short-stroke gas piston system, the MR556A1 reduces carbon fouling, ensuring extended reliability and minimal maintenance. With a free-floating cold hammer-forged barrel, fully ambidextrous controls, and a premium aluminum handguard, this rifle is engineered for peak performance and rugged dependability.
Models & Features in the Heckler & Koch MR556A1 Series:
-
Heckler & Koch MR556A1 – Standard Model (Premium Civilian AR-Style Rifle)
- Caliber: 5.56 NATO / .223 Remington
- Barrel Length: 16.5 inches (Cold hammer-forged, chrome-lined, 1:7 twist)
- Action: Short-stroke gas piston for cleaner operation
- Trigger: 2-stage precision trigger
- Stock: Adjustable HK collapsible stock
- Handguard: Free-floating M-LOK aluminum rail
- Ideal for tactical applications, sport shooting, and home defense
-
Heckler & Koch MR556A1 Competition – Optimized for Precision Shooting
- Caliber: 5.56 NATO
- Barrel Length: 16.5 inches (Match-grade barrel for enhanced accuracy)
- Features: Extended handguard, enhanced trigger, optimized weight distribution
- Perfect for competitive shooters and long-range precision shooting
-
Heckler & Koch MR556A1 Pistol – Compact Tactical Model
- Caliber: 5.56 NATO
- Barrel Length: 10.4 inches (Compact for maneuverability)
- Brace: Stabilizing arm brace for enhanced control
- Designed for close-quarters tactical applications and home defense
Key Features Across the Series:
- HK short-stroke gas piston system for extreme reliability
- Cold hammer-forged barrel with chrome lining for longevity & precision
- Ambidextrous safety selector & mag release for enhanced control
- Extended free-floating aluminum M-LOK handguard for superior ergonomics
- HK collapsible stock with multiple length adjustments
- Compatible with AR-15/M16 magazines for convenience
Applications:
- Tactical & law enforcement use
- Precision long-range shooting & competition
- Home defense & personal security
- Rifle training & recreational target shooting
Technical Specifications:
- Overall Length: Approx. 33.9 – 37.7 inches (Standard Model)
- Weight: Approx. 8.6 lbs (unloaded)
- Frame Material: Aluminum receiver with steel-reinforced barrel extension
- Twist Rate: 1:7 RH twist for stabilizing heavy rounds
- Magazine Type: Compatible with standard AR-style magazines (30+1 capacity)
- Trigger: HK 2-stage match trigger system
