RIS SYSTEM TO ATTACH ACCESSORIES AND SLING ADAPTER. RETRACTABLE CRANE STOCK FOR NUN CHUCK STYLE BATTERY. FULL METAL BUILD FOR DURABILITY. PACKAGE PROVIDES A 300RD HIGH CAPACITY MAGAZINE. INNER BARREL MEASURES OUT TO 300MM IN LENGTH. In the Box Rifle instruction manual 300-round high capacity magazine tactical foregrip Specifications: Operation Electric AutomaticBody Full Metal Receiver, Stock Bar, Barrel, Pistol GripFiring Modes Semi-automatic and Full-automatic Muzzle Velocity 350-400 FPS (w/ 0.20g BBs)Magazine 300-round high capacity (gear wind-up)Gearbox Full metalHop-up AdjustableWeight 8 pounds California Proposition 65 Warning: Cancer and Reproductive Harm - www.P65Warnings.ca.gov