Description
The HK MR556 Match Rifle is a premium 5.56mm semi-automatic rifle built to HK’s exacting military standards, featuring a 16-inch cold hammer-forged barrel, an adjustable stock, and a 10-round magazine. It delivers match-grade accuracy and legendary HK reliability in a civilian-legal platform, designed for the shooter who demands the pinnacle of performance and durability. This is the closest you can get to the military’s HK416 without an NFA stamp.
Key Features
- HK Proprietary Gas Piston System: Runs cleaner and cooler than direct impingement, reducing fouling and increasing reliability in adverse conditions.
- 16″ Cold Hammer-Forged Barrel: Chrome-lined for longevity, with a 1:7 twist rate to stabilize a wide range of bullet weights.
- Adjustable 6-Position Stock: Provides a customizable length of pull for optimal control and comfort, whether you’re in kit or a t-shirt.
- HK Match Trigger: A crisp, single-stage trigger designed for precision shooting right out of the box.
- Full Ambidextrous Controls: Includes a non-reciprocating charging handle and ambi selector for seamless operation from either shoulder.
Specifications & Details
| Specification | Detail |
|---|---|
| Caliber | 5.56x45mm NATO |
| Barrel Length | 16 inches |
| Twist Rate | 1:7 inches |
| Overall Length (Stock Extended) | Approx. 35.5 inches |
| Weight (Unloaded) | Approx. 8.9 lbs |
| Magazine Capacity | 10 Rounds (Includes 1 HK Steel Magazine) |
Built on a forged 7075-T6 aluminum upper and lower receiver set, the MR556 is mil-spec compatible where it counts. This means it accepts a vast array of standard AR-15 handguards, grips, and triggers, allowing for customization. The included 10-round magazine ensures compliance in all states, and the rifle ships to Missouri and compliant US states. The fit and finish are what you expect from HK—precise, robust, and ready for serious use. At $3189.79, you’re investing in a benchmark of rifle engineering.
Who This Rifle Is For
This rifle is for the discerning shooter who views their equipment as a critical component of their performance. It’s for the tactical professional seeking a duty-grade rifle for defensive use, the precision-oriented shooter who competes in practical rifle matches, and the collector who appreciates German engineering at its finest. When it comes to home defense or duty use where absolute reliability is non-negotiable, this platform is engineered for that moment. It’s also for the shooter who wants a no-compromise, no-gunsmithing required foundation—you mount an optic, and it’s ready to perform.
Pros & Cons
Pros: Unmatched reliability from the HK piston system. Superior accuracy potential from the match barrel and trigger. Exceptional build quality and durability. Runs significantly cleaner than DI guns. Ambidextrous controls are a genuine force multiplier. Compatible with many standard AR-15 parts and accessories, like Magpul stocks and Geissele triggers.
Cons: Higher price point than most AR-15 platforms. Heavier than a comparable direct impingement rifle due to the piston system. Proprietary bolt carrier group and barrel nut require specific tools for detailed disassembly.
Frequently Asked Questions
Q: Is the HK MR556 just a civilian HK416?
A: It is the closest commercially available variant. The core operating system—the short-stroke gas piston—and the cold hammer-forged barrel are identical in concept and manufacture. The key differences are the semi-automatic-only fire control group and the 16-inch barrel configuration for civilian legality.
Q: Can I use standard AR-15 magazines in the MR556?
A: Yes. The HK MR556 is designed to use standard AR-15 pattern magazines, including USGI aluminum mags and popular PMAGs from Magpul. The included 10-round HK steel magazine is renowned for its durability but is interchangeable with common magazines.
Q: What kind of accuracy can I expect from this rifle?
A: With its free-floated, cold hammer-forged barrel and match-grade trigger, the MR556 is capable of sub-MOA accuracy with quality match-grade ammunition. That said, its real strength is consistent, reliable precision shot after shot, under conditions where other rifles might falter.
Ready to own a benchmark in modern rifle design? This HK MR556 Match Rifle is available at firearms-missouri.com for Missouri residents and nationwide. FFL transfer required for firearm purchases.
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