Reply To: My Ninja 68/4500



I just went through a similar thing with my ninja 90 lite and my Benjamin Marauder.  I contacted Ninja and they helped.  I had to add some spacer washers to bring the regulator output up to the needed 3000psi. 


Contact them and have some pics of the tank/regulator and model numbers to send to them.  They will most likely send the spacers at no cost (at least they did for me).  They are very helpful and stay in contact until it is right by you.