Description
HK MR556 A4 5.56x45mm/223 Rem Pistol 30+1, 11" Barrel, M-LOK
Overview:
The HK MR556 A4 is a premium tactical AR-platform pistol chambered in 5.56 NATO/.223 Rem, developed using the same standards and quality control as the legendary HK416. Designed for rugged reliability and superior accuracy, it features an 11" cold-hammer-forged barrel, gas piston operating system, and ambidextrous controls for top-tier performance in any environment.
Key Features:
- 5.56x45mm NATO / .223 Rem – Dual caliber compatibility
- 11" Threaded Barrel – Ideal length for compact maneuverability
- Short-Stroke Gas Piston – Cleaner, more reliable operation compared to direct impingement
- 30+1 Capacity – Standard high-capacity AR-style magazine
- M-LOK Handguard – Lightweight and modular for mounting accessories
- Picatinny Top Rail – Ready for optics, sights, or other attachments
Specifications:
- Caliber: 5.56x45mm NATO / .223 Rem
- Action: Semi-Auto, Gas Piston
- Capacity: 30+1
- Barrel Length: 11"
- Barrel Description: Threaded, Cold Hammer Forged, 1:7” Twist
- Thread Pattern: 5/8"x24
- OAL: 26.50"
- Weight: 6.61 lbs
- Receiver: Picatinny Rail, Black Finish
- Stock Description: 6 Position (Brace or Buffer Tube Compatible)
- Stock Material/Finish: Synthetic / Black
- Grip: Black Polymer
- Sights: None (Optics Ready)
- Safety: Ambidextrous Safety Lever
- Trigger Pull: 4.50–5.60 lbs
- Grooves: 6
- Handguard: Free-Float M-LOK
- Height: 7.50"
- Width: 3.07"
Applications:
-
Tactical Operations – Compact size and gas piston system ideal for close-quarters use
-
Personal Defense – High capacity and reliability in a maneuverable package
-
Law Enforcement/Military Training – Duty-ready design and performance
-
Custom AR Builds – Premium HK base with modular potential
Additional Features:
- Proprietary HK Gas Piston System – Improves reliability and reduces fouling
- Cold Hammer Forged Barrel – Exceptional durability and accuracy
- Modular Platform – Compatible with many AR-style components and upgrades
- Precision Machined Receiver – Exceptional fit and finish
- No Sights Included – Allows customization with your preferred optic or BUIS setup
MPN: 81001050
UPC: 642230269439
