Often you will get low chronograph results with your stock KWA air nozzle. Most believe this is due to a lack of a sealing o-ring inside the bore of the nozzle. This is not always the case as sometimes the nozzle will seal decently well on the cylinder head. What can be the problem is when the air nozzle does not engage the sealing surface fully. Here is a small and easy-to-do modification:- Take a Dremel or grinding wheel and remove .5 millimeter of material off the end of your tappet plate as shown.
- Do the same to the stabilization wedges on the air nozzle in photo 2. These wedges are contacting the gearbox extensively on a small area in the nozzle cutout on the gearbox.
- Often you will need to remove a small dip in the blade of the tappet plate to allow the sector gear axle to properly fit, thus allowing the tappet plate to move forward more as well.
In my experience this mod can deliver 20 to 50 fps depending on the quality of modification and applications.
