i had a a5 as well most i could was 230 fps . tryed spring , tryed a new front bolt , new valve body and valve . and same results . so i started reading and seen this bb mod . this marker had a car stock on it . i added 2 bb in the car stock hole spring and it went to 305 fps .
now i adjusted the volicity screw and have 270 fps with the flatline and working great .
still have the WAS board problems . set it on bust or full auto and it will rapid fire on it own when u pull the trigger . in semi mode works just fine .
off to the trigger threads on fixing this .
thanks for having such great info here