I bought a used Black Rain Ordinance rifle for my HPA and do not need these parts. It worked when it was in the BO rifle. The only thing that I did was change out the trigger. For some reason, the unit will not fire now. Might be because of the trigger or the selector plate. It was nice to see the Titan Gate in the box when I opened up the King Arms gear box, but I have no need for it. The gear box did not have all of the screws when I received it. Gear box is King Arms V2 gear box. The motor is a Infinity CNC U-18000 Would like to sell together, but willing to take offers.