Gearbox finally cracked on my M4 I got last year :( I had alot of great parts in it and am looking to sell, here's a parts list and pictures of the parts will be provided if asked. Gate Titan (Rear Wire) - 60 (SOLD) Lonex Cylinder - 8 Lonex Piston (Slightly Worn) - 6 Lonex Nozzle and Tappet Plate- 10 Lonex Mushroom Piston Head - 8 Lonex Double O ring Cylinderhead - 8 Spring Guide Ball Bearing - 7 SHS 13:1 Gears (extra shims included)- 15 (Add 8mm Bushings for 5) Matrix Magnum HT Motor - 20 Metal Rails - 20 Full Metal Upper (comes with charging handle) - 20 Full Metal Lower (comes with grip) - 15 Buffer tube - 8 PTS stock (Basically Brand new) - (SOLD) AR latch - 5 If you buy multiple items I'll work with you on the price but you are expected to pay shipping and no low balling as these parts are in good condition (besides the piston).