OVERVIEW
The STM556 is designed to compete in the crowded AR-15 market - offered by the Austrian concern with a quick-change barrel feature and ambidextrous controls.
The STM556 is designed to compete in the crowded AR-15 market - offered by the Austrian concern with a quick-change barrel feature and ambidextrous controls.
YEAR: 2012
MANUFACTURER(S): Steyr-Mannlicher - Austria / Rheinmetall - Germany
OPERATORS: Austria; United States
SPECIFICATIONS
Common measurements, and their respective conversions, are shown when possible. Calibers listed may be model/chambering dependent.
Common measurements, and their respective conversions, are shown when possible. Calibers listed may be model/chambering dependent.
ACTION: Selective Fire; Gas-Operated
CALIBER(S): 5.56x45mm NATO
LENGTH (OVERALL): 850 millimeters (33.46 inches)
LENGTH (BARREL): 370 millimeters (14.57 inches)
WEIGHT (UNLOADED): 6.33 pounds (2.87 kilograms)
SIGHTS: Iron Front and Rear; Optional Optics
MUZZLE VELOCITY: 2,900 feet-per-second (884 meters-per-second)
RATE-OF-FIRE: 900 rounds-per-minute
RANGE (EFFECTIVE): 1,650 feet (503 meters; 550 yards)
VARIANTS
Series Model Variants
• STM556 - Base Series Designation
• RS556 - Assault rifle form offered by Rheinmetall of Germany and Steyr-Mannlicher; variable barrel lengths; 4.2kg weight; lightweight adjustable stock; standard and optional accessories rail support.
Series Model Variants
• STM556 - Base Series Designation
• RS556 - Assault rifle form offered by Rheinmetall of Germany and Steyr-Mannlicher; variable barrel lengths; 4.2kg weight; lightweight adjustable stock; standard and optional accessories rail support.