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Heckler & Koch MR556 A4 5.56 NATO 16.5" M-LOK Rifle | 81000827Premium HK416-Based AR-15 with Advanced Features and Ambidextrous Controls
The Heckler & Koch MR556 A4 (Model 81000827) is a high-end, semi-automatic rifle built on the legendary HK416 platform. Chambered in 5.56 NATO / .223 Remington, this premium AR features a 16.5-inch barrel, an M-LOK free-float handguard, an adjustable gas block, and full ambidextrous controls. Designed for serious shooters who demand reliability, accuracy, and modern ergonomics, the MR556 A4 delivers the performance and quality that Heckler & Koch is renowned for.
Key Features & Benefits
- HK416 Platform: Built on the proven HK416 operating system, known for exceptional reliability and durability in demanding conditions.
- 16.5" Barrel: Precision barrel delivers excellent accuracy and velocity while maintaining a compact overall length.
- M-LOK Free Float Handguard: Lightweight, modular handguard allows for easy attachment of accessories while improving accuracy by eliminating pressure on the barrel.
- Adjustable Gas Block: User-adjustable gas system allows fine-tuning for optimal performance with various ammunition types and suppressors.
- Ambidextrous Controls: Features ambidextrous safety selector, magazine release, and bolt catch for left and right-handed shooters.
- HK USA Enhanced Grip: Ergonomic grip designed for improved control and comfort during extended shooting sessions.
- HK416 Six-Position Stock: Adjustable stock provides a customizable length of pull for different shooters and shooting positions.
- Anodized Black Finish: Durable anodized finish provides excellent corrosion resistance and a professional appearance.
- 30-Round Magazine: Includes one 30-round magazine for immediate use.
Technical Specifications
| Manufacturer | Heckler & Koch |
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| Model Number | 81000827 |
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| UPC | 642230269408 |
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| Caliber | 5.56 NATO / .223 Remington |
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| Barrel Length | 16.5 inches |
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| Handguard | M-LOK Free Float |
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| Gas System | Adjustable Gas Block |
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| Stock | HK416 Six-Position Adjustable |
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| Controls | Ambidextrous |
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| Capacity | 30 Rounds |
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| Finish | Anodized Black |
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| Overall Length | 33" - 36.5" (approx.) |
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Why Choose the Heckler & Koch MR556 A4?
The MR556 A4 represents the pinnacle of Heckler & Koch’s AR platform development in the United States. Built with the same attention to detail and engineering excellence as the HK416 used by elite military units worldwide, this rifle offers superior reliability, accuracy, and ergonomics. The inclusion of an adjustable gas block makes it particularly well-suited for suppressed shooting, while the ambidextrous controls and enhanced grip provide a modern, user-friendly experience.
Whether you’re a competitive shooter, a serious enthusiast, or someone who demands the highest quality in a 5.56 NATO rifle, the MR556 A4 delivers unmatched performance and craftsmanship. Its free-float M-LOK handguard and adjustable gas system give shooters the flexibility to customize their setup for any mission or range day.
Ideal For
- Competitive shooting and 3-Gun matches
- Suppressed rifle configurations
- Professional users and serious enthusiasts
- Home defense and tactical applications
- Shooters who prefer ambidextrous controls
- Anyone seeking a premium, HK416-based AR-15
Experience premium German engineering with the Heckler & Koch MR556 A4 (Model 81000827, UPC 642230269408).
This feature-rich 5.56 NATO rifle combines the legendary reliability of the HK416 platform with modern enhancements like an M-LOK handguard, adjustable gas block, and full ambidextrous controls. Built for performance and precision, the MR556 A4 is a top-tier choice for discerning shooters.The End```
