for my aggressor xt? right now it is stock. but its summer, so time for upgrades....
i was thinking,
custom products spyder drop forward (same as 32 degrees flame, except it only fits spyders)
check it products icepick bolt
dye sticky grip
check it products spyder 15 degree assault block kit
any barrel that will match the zise of paint that you use will be good. the CIP 15* assault block has a larger airflow into as well, so you can LP later if you want (with the purchse of some other items)