MR556 A4 | 16.5"

Heckler & Koch USA MR556 A4

The latest update from HK-USA to the civilian variant of the legendary HK416—the MR556 A4 and MR762 A4—represents a further refinement of Heckler & Koch’s uncompromising performance.

The short-stroke gas piston system prevents hot combustion gases from being recirculated into the bolt system. As a result, the rifle can be operated for longer periods, requires less maintenance, and causes less wear on internal components than traditional AR systems with direct impingement.

The adjustable gas regulator allows for precise tuning of the system—whether used with or without a suppressor.

With fully ambidextrous controls, a lighter weight, and a sleeker profile, the A4 is easier to operate, handle, and deploy.

For anyone seeking an AR system with unmatched performance, as well as the highest reliability and durability, the MR A4 models remain the top choice in the premium class.

A firearm acquisition permit is required to purchase this weapon.

Please send us the following two documents immediately after or before making your online purchase:
1. All three copies of the approved firearm acquisition permit (WES), in original form and signed.
2. A copy of an official form of identification (ID card or passport)

Or bring the above documents with you when you pick up the firearm at our store.

Please send the documents to info@thoron.ch or to the following address:

Thoron AG
Bahnhofstrasse 25a
6422 Steinen