Programmable electric control MOSFET M-LOK modular railed handguard system Picatinny accessory rails in 3, 6 and 9 o' clock positions Seamless top rail runs from rear of receiver to front of RIS Quick-change spring system Heat treated polymer spring guide Full metal Version 2 gearbox with 9mm bushings Crisp and responsive trigger response Ambidextrous bolt, magazine release and selector switch Collapsible stock for CQB engagements Rotary hop-up system for ease of use Built-in deans connector for improved efficiency Impressive rate of fire with use of LiPo batterySpecifications: Operation Electric AutomaticBuild Metal and PolymerFiring Modes Semi-automatic, Full-automatic, 3rd Burst (and other settings using EFC), w/ Functional SafetyMuzzle Velocity 380 - 400 FPS (w/ 0.20g BBs)Gearbox Full Metal Version 2Magazine Capacity 300rd High CapacityBattery 7.4V 1000mah Stick LiPo (not included) w/ Deans (Male) to Tamiya Adapter (Female) Inner Barrel Length 380 mmInner Barrel Diameter 6.03 mm TightboreHop-Up Yes, AdjustableWeight 6.8 lbsOverall Length 30.25 in. / 34.25 in. (Retracted / Extended) 1X Rifle