The new HK MR556A4 - Civilian HK 416

Published on December 20, 2024
Duration: 29:17

The HK MR556A4 represents a significant upgrade over its predecessor, aligning civilian models with modern HK 416 specifications. It features a lighter profile, improved gas system, and full ambidextrous controls. Despite exceptional accuracy, its high price point positions it as a niche, premium firearm.

Quick Summary

The HK MR556A4 is a civilian variant of the HK 416, featuring a lighter 7.57 lb weight, a refined two-position adjustable gas system, and full ambidextrous controls. It delivers exceptional sub-MOA accuracy, with best groups at 0.35 inches at 100 yards, but its premium price over $3,500 positions it as a niche collector's item.

Chapters

  1. 00:00Introduction to the HK MR556A4
  2. 03:17Weight and Handling Comparison
  3. 04:32Shooting and Gas System Performance
  4. 09:18External Features and Ambidextrous Controls
  5. 11:12Technical Teardown and Internal Differences
  6. 15:05Accuracy Testing
  7. 16:33Final Assessment and Market Position

Frequently Asked Questions

What are the key differences between the HK MR556A4 and the MR556A1?

The MR556A4 is significantly lighter (7.57 lbs vs 8.76 lbs) due to a slimmer barrel and updated receivers. It also features a more refined, two-position adjustable gas system, full ambidextrous controls, and an M-LOK handguard, aligning it closer to modern military specifications.

How accurate is the HK MR556A4?

Despite its lighter barrel profile, the MR556A4 demonstrates exceptional accuracy. During testing with premium 77gr ammunition, it achieved sub-MOA groups, with the best recorded group measuring an impressive 0.35 inches at 100 yards.

What are the ambidextrous features on the MR556A4?

The MR556A4 includes a fully ambidextrous charging handle, a bolt stop/release lever similar to a PDQ device, and an ambidextrous magazine release, enhancing usability for both right and left-handed shooters.

Is the HK MR556A4 a good value for its price?

The MR556A4 is a premium firearm priced over $3,500. While it offers significant upgrades and excellent performance, its high cost and proprietary parts make it more suitable for collectors or users prioritizing HK's specific platform over general-purpose AR-15 utility.

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