Features Aluminum alloy upper receiver and barrel assembly Fixed stock with triangular polymer lower receivers, stock and pistol grip Adjustable front and rear sights Reinforced V2 metal gearbox Wired to the stock with a small Tamiya connector (Battery included) Released: Feb. 2021 Type: Automatic, battery operated Firing Modes: Semi/Full-Auto, Safety (AMBI Selector) Highest quality metal materials and craftsmanship Designed and built with the utmost attention to detail Heavy, and well distributed weight 2-piece split metal upper receiver and polymer lower receivers Strong metal construction from tip to stock tube No.2 Metal Gearbox with metal gears The big line diameter Spring 18:1 Gear ratio Metal upper receiver Aluminum alloy hadguard(fishbone) Metal silencer fire cap/tip Metal sight Metal barrel Metal outer barrel to reduce vibration CNC Metal switch CNC Metal Pin Hop-Up: Yes, Adjustable(Starting on July 6, 2022) Laser Print on Receiver Extendable stock Charging handle opens dust cover Uses 7-8mm gel balls Specifications: Length: 764-850mm Weight: 4040g Inner Barrel: 509mm Magazine Capacity: 200rd Hi-Capacity. Works with other compatible M4 / M16 Series Gel blaster AEG Mags FPS Variable: 300-320Variable FPS for different gels used, we recommend using 7-8mm hardened gelsDepending on the battery size a 7.4V battery will achieve a higher FPS than an 11.1VAlso the semi-auto function has a higher FPS than full-auto function. Thread Direction: 14mm Negative Gearbox: Ver 2 Full Metal, Fully Upgradeable Motor: Long Type High Torque 480 Fire Modes: Semi/Full-Auto, Safety Battery: 11.1v Small Butterfly Type recommended (Battery included. Wired to stock with small Tamiya connector)