MANUFACTURER: Heckler and Koch (HK USA)
FAMILY: MR556 Series
MODEL: MR556 A4
TYPE: Semi-Auto Pistol
ACTION: Semi-Auto
CALIBER/GAUGE: 223 Rem | 5.56 NATO
FINISH: Black
FINISH TYPE: Black
STOCK: Collapsible / Folding Stock
STOCK/GRIPS: HK Endanced Ergonomic Grip
BARREL: 11"
OVERALL LENGTH: 26.5"
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
WEIGHT: 6.61 lbs.
SHIPPING WEIGHT: 11.3 lbs.
SAFETY FEATURES: Ambidextrous Safety Lever
RECEIVER: Fully Ambidextrous Lower
ADDL INFO: Short Stroke Gas Piston
ADDL INFO: HK416 Upper Receiver
ADDL INFO: M-LOK Handguard
MFG MODEL NO: 81001050
UPC: 642230269439
 WARNING
Cancer and Reproductive Harm 
www.P65Warnings.ca.gov