The MR556 A4 short-stroke gas piston operating system does not impart hot carbon fouling back into the action, allowing the weapon to run longer, with less maintenance and with less wear on internal components. Its adjustable gas regulator allows the operator to tune the action specifically for suppressed or unsuppressed operation. Fully ambidextrous controls, lighter weight and a slimmer profile make the new A4 easier to operate, manipulate and employ.
HK 81001051 MR556 A4 5.56x45mm 10+1 11″ Black Threaded Barrel,
HK 81001051 MR556 A4 5.56x45mm 10+1 11″ Black Threaded Barrel, M-LOK Handguard, Black Picatinny Rail Receiver, Black Synthetic 6 Position Stock, Black Polymer Grip, Ambidextrous
| UPC | 642230269446 |
|---|---|
| Manufacturer | Heckler & Koch / H&K |
| Manufacturer Part Number | 81001051 |
| Caliber/Gauge | .223 REM/5.56 NATO |
| Product Type | AR |
| Model | MR556 A4 |
| Capacity | 10 |
| Barrel Length | 11" |
| Action | Semi-Auto |
| Number of Magazines | 1 10 rd. |
| Rate of Twist | 1-in-7" |
| Shipping Weight | 0.0 |
| Sights | No Sights |
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