Jg Airsoft Urban Assault Hybrid Ua-4 Aug Ris Metal Gearbox Aeg RifleSPECIFICATIONS: OPERATION: ELECTRIC AUTOMATIC BUILD: METAL GEARBOX POLYMER RECEIVER FIRING MODES: SEMI AUTOMATIC AND FULL AUTOMATIC MUZZLE VELOCITY: 380 430 FPS MAGAZINE: 300 ROUND HIGH CAPACITY (GEAR WIND UP) GEARBOX: FULL METAL REINFORCED BATTERY TYPE: 8. 4V MINI INNER BARREL LENGTH: 509 MM HOP UP: ADJUSTABLE WEIGHT: 8 POUNDS PACKAGE INCLUDES: RIFLE, INSTRUCTION MANUAL, 300 ROUND HIGH CAPACITY MAGAZINE