What should I buy with mission funds?

So far I think the only item that really worth buying is the pistol heavy magazine from uncommon weapon mod as you can only acquire them with MF.

The heavy pistol magazine (+101% capacity) would increase weapons like Ushior from magazine size of 2 to 4. And for characters with munition training 5b, it would increase from 2 to 5.



Edit：

Ushor's single clip DPS:
896*70/60 = 1045.33

Multi-clip DPS of Ushor (3bullets):
((60/70)*3)/((60/70)*3+1.75)*1045.33 = 622.01

Multi-clip DPS of Ushor (4bullets):
((60/70)*4)/((60/70)*4+1.75)*1045.33 = 692.08

Multi-clip DPS of Ushor (5bullets):
((60/70)*5)/((60/70)*5+1.75)*1045.33 =742.25

It would increase the Multi-clip DPS by 7.2% (742.25/692.08=7.2%) for characters with munition training 5b.
And 11.3% (692.08/622.01 =11.3%) for characters without munition training 5b.

Don't buy anything that isn't a rare, uncommon, or common weapon mod. Everything else will drop from a pack. Not the mods though. But common mods seem to be the best thing to buy right now. But uncommons I guess will cycle in eventually. I haven't researched them though and forget their effects from single player. I personally just bought enough to have at least one of each common (as well as rare), in case the uncommons are good when they cycle. But the commons are here to stay it looks like

It rounds up from +126% to equavilent of +200% on Ushior?