MR556 A4 5.56 16.5" 30+1 GRY 223 Rem | 5.56 NATO
- MANUFACTURER: Heckler and Koch (HK USA)
- FAMILY: MR556 Series
- MODEL: MR556 A4
- TYPE: Rifle
- ITEM GROUP: AR Style Centerfire Rifles
- ACTION: Semi-Auto
- CALIBER/GAUGE: 223 Rem | 5.56 NATO
- FINISH: Gray Cerakote
- FINISH TYPE: Applied Finish
- STOCK: Collapsible / Folding Stock
- STOCK/GRIPS: HK416 Slimline Furniture
- BARREL: 16.5"
- OVERALL LENGTH: 33.25" to 36.5"
- RATE-OF-TWIST: 1-in-7"
- CAPACITY: 30 + 1
- # OF MAGAZINES: 1
- MAG DESCRIPTION: 30 rd.
- SIGHTS: No Sights
- SIGHT TYPE: None
- THREAD PATTERN: 1/2x28
- SPECIAL FEATURE: Threaded Barrel
