This is a great rifle for anyone getting into airsoft or anyone who just wants another gun. Polarstar HPA conversion is available. Upgraded Hopup, Bucking, Inner Barrels are available for installed before shipping as well Gun Features: -Full metal Version 2 gearbox has a quick change system that allows for quick and easy spring changes to easily adjust FPS to meet any field requirement -The boxes uses ultra smooth 8mm ball bearings with an 18:1 steel gear ratio, and a 19k RPM high torque motor that provides reliable and consistent performance -M-LOK handguard provides plenty of rail space to mount your favorite M-LOK compatible accessories -The polished 6.03mm tightbore inner barrel offers improved range and accuracy -New Gen 3 style pistol grip allows for better ergonomics -Full length 20mm picatinny rail that allows for the user to mount optics, lights, lasers, PEQ boxes as well as other 20mm picatinny accessories -Flip-up front and rear iron sights with a quick deploy mechanism allows for easier target acquisition -Retractable stock with multiple positions that meet comfort for shooters of any size FPS (Feet Per Second): 370 - 380 FPS Overall Length: 24.5" - 28" Adjustable Product Weight: 4.75 Lbs Barrel Thread Spec: 14mm Negative Included Magazine Capacity: 140 Round Mid-Cap Gearbox Version: Full metal V2 Gearbox Firing Modes: Semi/Full-Auto, Safety Recommended Battery: 11.1v Buffer Tube LiPo Recommended Wired to rear with Tamiya Package Includes: Gun, Magazine, Manual