Heckler & Koch MR556 A4 5.56 NATO Rifle
$3,668.24
Out of stock
Modern sporting rifle featuring short-stroke gas piston operation, adjustable gas regulator, ambidextrous controls, 16.5" threaded barrel, M-LOK handguard, and Patriot Brown receiver.
FFL
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Heckler & Koch MR556 A4: Modern Engineering Meets Practical Design
The MR556 A4 represents a thoughtful approach to modern rifle design, combining proven piston-driven technology with contemporary ergonomics. This is a rifle built for those who understand that reliability and ease of operation matter.
Key Features
Short-Stroke Gas Piston System
- Operates independently of the bolt carrier group, keeping hot carbon fouling out of the action
- Runs cleaner and longer between maintenance cycles
- Reduces wear on internal components compared to direct impingement designs
- Allows the rifle to function reliably in demanding conditions
Adjustable Gas Regulator
- Tune the action for suppressed or unsuppressed operation
- Optimize performance based on your ammunition and configuration
- Gives the operator control over the weapon's behavior
Ergonomic Design
- Fully ambidextrous controls for left and right-handed shooters
- Lighter weight and slimmer profile than many competitors
- Easier to manipulate and employ in the field
- M-LOK handguard for modern accessory mounting
Specifications
- Caliber: 5.56 NATO
- Barrel Length: 16.5 inches with muzzle threads
- Receiver: Patriot Brown Picatinny rail system
- Stock: 6-position black synthetic
- Capacity: 30-round magazine
- Controls: Ambidextrous safety and charging handle
This is a rifle for shooters who value function over fashion—a tool built to work when it matters.
Attributes
Action:
Semi-Automatic
Barrel Description:
Threaded
Barrel Length:
16.5"
Caliber:
5.56x45mm
Capacity:
30+1
Hand:
Ambidextrous
Metal Finish Group:
Blued/Black
Overall Length:
36.50"
Safety:
Ambidextrous Lever
Sights:
None
Stock Description:
6 Position
Stock Finish Group:
Black
Twist Rate:
1:7
Weight:
7.67 lbs
