Includes 2500 round hi cap drum mag Billet style CNC aluminum receiver; the first all metal 9mm AR platform on the market MLOK front rail for grip, lights, and other tactical accessories Compact design great for indoor and CQB use Flip-up front and rear sights ECS MOSFET trigger system PDW style retractable stock Quick change spring system Reinforced gearbox with CNC wire cut gears and 9mm bearings FPS Range: 330-350 Length: 510mm-590mm (2-position stock) Weight: 2.35kg Inner Barrel: ~140mm Magazine Capacity: 100rds Muzzle Velocity: 330-350 FPS (Measured with 0.20g BBs) Thread Direction: 14mm Count-Clockwise, negative Gearbox: Version 2 with Quick-Change spring guide Motor: Long Type Fire Modes: Semi/Full-Auto, Safety Battery: 7.4v Small Type LiPo recommended (Battery not included. Wired to stock with Small Tamiya connector) Hopup: Yes, adjustable Package Includes: Gun, Magazine stock wiggles really easy fix just needs tightening but don’t feel like doing it so this gun is discounted