Your AEG really doesn't have the full potential to do much more with 20fps..The common thought that more FPS is always better is false..at the engagement range you will be shooting at, your best bet is to get some BIOVAL BBBMAX .27's. They will add more range than 20fps will any day. You should be able to hit a coke can 75% of the time with your mods and those bb's at 125-150ft