Custom built and tuned M4 by Simple Airsoft, Had it tuned last year, and it's been sitting since. Haven't had any time to play due to college. (See Last Photo) Built list is as follows Internals: Shimmed and and assembled by Simple Airsoft CA gearbox Gate Titan Maxx trigger with trigger job SHS 12:1s ASG 22k ultimate motor Rocket Airsoft 14.5 Full Steel Tooth piston Rocket Airsoft CNC Aluminum ball bearing piston head Rocket Airsoft Oilless Bushings SRC Anti Reversal Latch Unknown cylinder and cylinder head ProWin Hopup Externals: Custom-made Simple Airsoft wooden stock Classic Army upper and lower reciever Ares Honey Badger Rail Angel Custom Honey Comb Supressor Magpul Vertical grip Eotech Clone with Sight Protector Also Comes with: Rifle Case Titan 11.1 3000mAh Battery 4x LT High-speed midcaps Rail mounted Flashlight 600 Lumen Gate titan USB link Message me to discuss pricing if buying locally (South FL area) If you have any other questions, feel free to reach out :)