Heckler and Koch MR556 A4 Grey 5.56 16.5 Barrel 30-Rounds

HK MR556 A4 Features The MR556 A4's short-stroke gas piston operating system reduces heat and carbon in the receiver for improved long-term reliability and cooler running under sustained fire. Paired with an HK416 upper and a 16.5 barrel threaded 1/2x28 for muzzle devices the platform offers excellent durability and straightforward integration of brakes or suppressors while maintaining factory-level accuracy and lockup. Ergonomics focus on user adaptability and control: a collapsible / folding stock with HK416 slimline furniture M-LOK handguard for modular accessory mounting a fully ambidextrous lower and ambidextrous safety lever and a 30-round magazine configuration to support a wide range of roles. The rifle ships with one 30 rd magazine and a gray Cerakote finish that resists corrosion and reduces glare. HK MR556 A4 Specifications Manufacturer: Heckler & Koch (HK USA) Model: MR556 A4 Family: MR556 Series Category: Rifles / AR Style Centerfire Rifles Action: Semi-Auto (Short-stroke gas piston) Caliber: .223 Rem / 5.56 NATO Barrel Length: 16.5 inches Barrel Description: Chrome-lined (threaded 1/2x28) Rate of Twist: 1-in-7 Thread Pattern: 1/2x28 Finish: Gray Cerakote (applied finish) Receiver: HK416 upper; fully ambidextrous lower Stock: Collapsible / Folding Stock Stock / Furniture: HK416 Slimline Furniture Handguard: M-LOK handguard Capacity: 30 + 1 Included Magazines: 1 A- 30 rd Sights: None (optic cut / optic-ready not specified) Weight: 7.67 lbs Overall Length: 33.25 to 36.5 (stock collapsed/extended) Number of Magazines: 1 Special Features: Threaded barrel; short-stroke gas piston; HK416 upper receiver; M-LOK handguard; fully ambidextrous controls; ambidextrous safety lever Shipping Weight: 14.4 lbs.