Attributes:
- ACTION: Semi-Automatic
- ADDITIAL FEATURE 1: Short Stroke Gas Piston
- ADDITIAL FEATURE 2: HK416 Upper Receiver
- ADDITIAL FEATURE 3: M-LOK Handguard
- CALIBER/GAUGE: 223 Rem / 5.56 NATO
- CAPACITY: 10 + 1
- DESCRIPTION: MR556 A4 5.56 11" 10+1 GRY
- FAMILY: MR556 Series
- FINISH: Applied Finish
- GRIP TYPE: HK Endanced Ergonomic Grip
- MAGAZINE: 1 10 rd.
- MANUFACTURER: Heckler & Koch
- MANUFACTURER MODEL NUMBER: 81001313
- MODEL: MR556 A4
- OVERALL LENGTH: 26.5"
- RATE OF TWIST: 1-in-7"
- RECEIVER FINISH: Fully Ambidextrous Lower
- SIGHTS: No Sights
- SPECIAL: Threaded Barrel
- STOCK FRAME GRIPS: Collapsible / Folding Stock HK Endanced Ergonomic Grip
- UPC: 642230272033
- WEIGHT: 6.61 lbs.
