HK MR556 A4 Features
This rifle incorporates a cold hammer-forged steel barrel with a 1:7″ twist rate and six-groove rifling, offering durability and precision for a variety of bullet weights. The threaded muzzle with a 5/8×24 pattern allows for easy suppressor or muzzle device installation, while the full-length Picatinny rail provides optimal optic placement and accessory attachment. The trigger pull weight, ranging from 4.5 to 5.6 pounds, ensures smooth and consistent operation.
The MR556 A4 is engineered with an ambidextrous safety, making it ideal for both left- and right-handed shooters. The rifle also features a robust polymer stock and grip, paired with a durable anodized handguard that supports accessories through the M-LOK interface. Whether for precision shooting or tactical use, the MR556 stands out as a versatile and rugged option.
HK MR556 A4 Specifications
- Brand: HK
- Model: MR556
- Series: A4
- Category: Tactical Rifles
- Caliber: 5.56x45mm
- Action: Semi-Auto
- Operating System: Gas Piston
- Capacity: 10 + 1
- Max Capacity: 10
- Barrel Length: 16.5″
- Barrel Description: Threaded
- Barrel Material: Steel
- Barrel Finish: Black
- Twist Rate: 1:7″
- Grooves: 6
- Thread Pattern: 5/8″x24
- Muzzle: Threaded
- Receiver Description: Picatinny Rail
- Receiver Finish: Patriot Brown
- Receiver Material: Aluminum
- Handguards: M-LOK
- Handguard Finish: Black
- Stock Description: 6 Position
- Stock Material: Synthetic
- Stock Finish: Black
- Overall Length: 36.5″
- Height: 7.5″
- Width: 3.07″
- Weight: 7.67 lbs
- Trigger Pull Weight: 4.50-5.60 lbs
- Safety: Ambidextrous Safety Lever
- Sights: None
- Hand: Ambidextrous
| Barrel Length | 16.5 |
|---|---|
| Caliber | 5.56 |
| Capacity | 10 |
| Condition | New in Box |
| Finish Per Color | Patriot Brown |
| Manufacturer | Heckler and Koch |
| Manufacturer Part Number | 81001204 |
| Model | MR556 A4 |
| Type | Modern Sporting Rifles |
| UPC | 642230271081 |
