HK MR556 A4 5.56 Pistol with M-LOK Handguard
$3,668.24
Out of stock
Heckler & Koch MR556 A4 in 5.56x45mm features a short-stroke gas piston system, 11-inch threaded barrel, M-LOK handguard, and fully ambidextrous controls for reliable, low-maintenance performance.
FFL
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HK MR556 A4: Modern Piston-Driven Performance
The MR556 A4 represents a refined approach to the modern rifle platform, built on proven short-stroke gas piston technology that separates it from conventional direct-impingement designs.
Key Features
Operating System
- Short-stroke gas piston design eliminates hot carbon fouling in the action
- Runs longer between cleanings with significantly less maintenance required
- Reduces wear on internal components for extended service life
- Adjustable gas regulator allows tuning for both suppressed and unsuppressed fire
Ergonomics & Handling
- Fully ambidextrous controls for left and right-handed shooters
- Lighter weight and slimmer profile than comparable designs
- Easier to manipulate and employ in the field
- Black synthetic pistol tube with black polymer grip
Configuration
- 11-inch threaded barrel for suppressor compatibility
- M-LOK handguard for modern accessory mounting
- Patriot Brown Picatinny rail receiver
- 30-round magazine capacity
The MR556 A4 delivers the reliability and low-maintenance operation that serious shooters demand, whether for sport, training, or professional use.
Attributes
Action:
Semi-Auto
Barrel Length:
11"
Caliber:
5.56x45mm NATO
Capacity:
30+1
Grips:
Black Polymer
Overall Length:
26.5"
Safety:
Ambidextrous Lever
Sights:
None
Stock Finish:
Black
Stock Material:
Synthetic
Weight:
6.61 lbs
