Nerf Roughcut 2X4 Replacement Gears

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These are designed to replace the gears inside a nerf Roughcut 2x4 if the original ones break. The centre hole will need to be drilled out with a 3mm drill bit. Replacement Instructions To replace them you first need to open the gun up (colours may be different depending on what version you own): Unscrew the 3 screws in the priming handle first and remove it. Next undo all the screws in the main body of the gun and open it up. (be careful of the small orange part and spring in the tactical rail at the top of the gun, it may fly off and get lost). You might want to take pictures at this point to help you put it back together. Inside you should see the two plunger tubes connected to the front barrel. The two plungers are connected to the main mechanism. This consists of a rack gear (flat gear) connected to the priming handle, two gears (one large and one small) and a second rack gear connected to the plungers. There is also the trigger, trigger catch and two other catches. These two catches have a habit of pinging out and getting lost, so make sure you get a good look at how they go back together. Remove the trigger, it should just pull out with a little twist. Next remove the plungers from the top rack gear. This is easiest done by gently twisting one of the plungers. You should now be able to see the two catches clearer, there is one on each side of the mechanism. Undo the 3 screws holding the mechanism together. There is also a small clip at the bottom of the mechanism that should come off easily once the screws are removed. It should now be easy to remove and replace the two gears, make sure you get them the right way around, small one at the top, large one at the bottom. Make sure that the two catches didn't fly off and reattach the top half of the mechanism with the 3 screws. Make sure that both rack gears can travel the full length of the mechanism and that all the catches work. Reconnect the plungers (make sure that the catch is being pressed down by the plunger, otherwise it wont prime) and the trigger. It should now be simple to replace all the parts back into the outer shell and reattach all the screws. Attach the priming handle last.