G&P / Polarstar Full Metal M4 R3 HPA Powered Airsoft Rifle (Length: 12.5" Keymod Handguard) Length: 800mm - 880mm, Adjustable Weight: 3360g Inner Barrel: 363mm Magazine Capacity: 130rd Golfball Textured Polymer Mid-Cap. Works with Tokyo Mari, Matrix, G&P and other compatible M4 / M16 Series Airsoft AEG Magazines Muzzle Velocity: 380 FPS variable with PSI adiustments Thread Direction: 14mm positive Gearbox: Polarstar JACK HPA engine Estimated Shots: 600-900 shots per tank (depending on settings) Fire Modes: Full/Semi-Auto, Safety Battery: 7.4v 380mAh, connected via JST plug Hopup: Yes, Adjustable Package Includes: Rifle, Vertical Grip, Stock, tank adapter -Has never been used still new -I bought it right before COVID hit and stoped playing -never bought a battery for it