The new HK MR556A4 - Civilian HK 416

Published on December 20, 2024
Duration: 29:17

This expert guide provides a detailed overview of the Heckler & Koch MR556A4, the civilian variant of the HK 416. It covers the rifle's significant weight reduction compared to the MR556A1, its refined two-position adjustable gas system, and comprehensive ambidextrous controls. The guide also delves into internal differences, barrel specifications, and accuracy potential, drawing on the insights of a well-known firearms expert.

Quick Summary

The Heckler & Koch MR556A4, the civilian HK 416, offers significant improvements over the MR556A1, including a lighter 7.57 lb weight and a refined two-position adjustable gas block. It achieves sub-MOA accuracy, with groups as small as 0.35 inches at 100 yards using 77gr ammunition.

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 improvements of the HK MR556A4 over the MR556A1?

The MR556A4 is significantly lighter, weighing around 7.57 lbs compared to the A1's 8.76 lbs. It also features a more refined two-position adjustable gas block and enhanced ambidextrous controls, bringing it closer to modern military specifications.

How accurate is the HK MR556A4?

The MR556A4 demonstrates excellent accuracy, achieving sub-MOA groups at 100 yards. The video highlights a best group of 0.35 inches using 77gr Fiocchi Match ammunition.

What are the notable external features of the MR556A4?

The rifle boasts full ambidextrous controls, including a bolt stop/release lever, an M-LOK handguard with QD mounts, a 1/4 turn selector lever, and a slimmer 6-position adjustable stock.

Is the HK MR556A4 considered a good value for its price?

While a significant improvement, its high price point (over $3,500) and proprietary parts position it as a niche product, potentially better suited for collectors than for general-purpose AR-15 users seeking affordability and parts interchangeability.

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