BOTTOM IS SOLD TOP: Bloomies Custom GB (Dan Blomquist) Advanced Gate Titan SHS Metal Rack Piston Lonex Cylinder Lonex Cylinder Head Lonex Piston Head Lonex Air Nozzle Straight Trigger Krytac 8mm Ball Bearings Krytac Tappet m120 Spring Krytac Gear Set Short Stroked 3 Teeth Sector Krytac AR Latch Krytac Nautilus I’m using the same policy as Umbrella Armory. This gearbox doesn’t include any kind of warranty or return because it requires the buyer to install it into the gun and depends on your skill.