I'm Selling Brand new GHK Colt Licensed M4A1 V2 RIS Gas Blowback Airsoft Rifle by Cybergun (Length: 12.5"). it comes with 2 Mags and Grade 6mm Airsoft BBs (5000 rounds) Features Full metal upper and lower receiver with stamped Colt trademarks Metal barrel assembly with fixed triangular front sight Metal RIS handguard allows for easy addition of any 20mm accessories Flat top receiver makes mounting optics or other accessories easy Adjustable LE style stock and polymer pistol grip CNC bolt carrier group with negative pressure blowback system. CNC process with heat treatment. Harder material and smooth performance Realistic fire controls with improved bolt locking lever Lighter weight magazine design reduces weight by 35% compared to the old 1st generation magazines Manufacturer: GHK / Licensed by Colt FPS: 400 Specifications: Length: 725mm - 810mm, Adjustable Weight: 2840 Inner Barrel: ~285mm Magazine Capacity: 40rd GHK M4 Magazine Thread Direction: 14mm Negative Gas Type: Green Gas Fire Modes: Semi / Full-Auto, Safety Package Includes: Gun, Magazine, Manual Hopup: Yes, Adjustable