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Mfg Item #: 81000828
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.
| Action | semi-auto |
|---|---|
| Barrel | 16.5" |
| Finish | Black |
| Length | 33.25" to 36.5" |
| Sights | No Sights |
| Caliber | 223 Rem | 5.56 NATO |
| Capacity | 10 + 1 |
| Magazine | 1 10 rd. |
| Receiver | Fully Ambidextrous Lower |
| Rate Of Twist | 1-in-7" |
| Stock Frame Grips | Collapsible / Folding Stock HK416 Slimline Furniture |
| Nfa Thread Pattern | 1/2x28 |
| Additional Feature 1 | Short Stroke Gas Piston |
| Additional Feature 2 | HK416 Upper Receiver |
| Additional Feature 3 | M-LOK Handguard |