Selling a brand new in original box M4A1 S System full auto electric Airsoft rifle. Features a full metal gearbox , high quality performance and durable build construction. Perfect for a reliable primary weapon on the field! This style of M4 with this type of Rail system was popularized in the video game Call of Duty MW2. Sporting a unique spin on the M4. Features - S - System handguard w/ Picatinny rail sections for tactical attachments - Lightweight, high impact polymer receiver Heavy duty metal outer barrel assembly, buffer tube, and rails - Easy access battery storage compartment in handguard - Reinforced Tokyo Marui compatible ver2 metal gearbox w/ metal internals, OEM CYMA/GE? - Adjustable flip-up front and rear sights - Adjustable length of pull LE style stock - clocks in at 380 FPS, Lipo ready. Package includes - M4 S system new in box with owners manual - 450 round metal high capacity magazine - Additional R.I.S. Rails for accessory attachment - Precision grade BBs