What upgradeable parts fit the Fusion?

[joethemetaldude]

Is it autococker parts for upgrades for the fusion?

[babustos]

The only possible Autococker parts that would fit without modification would be the barrel, regulator, and possibly other minor things.

[spideyman1]

the feedneck is matrix threaded, u can get bolts and rams from alamo city paintball, but in general there arent many ups for fusions