>>305022769
M249 is fine, it's still just as powerful as before but few people use it effectively. It's hurt by the slower movement speed in a game where the netcode favors fast peeks but if you abuse the broken crouching hitboxes and M249 recoil reduction you can make up for it.
Uzi is irredeemable garbage when solo but has to be balanced around akimbo. Sawn-offs do a more reliable job at close range, anything beyond that may as well be useless for both weapons but at least with Uzis you can swap to one for range if you really have no other choice.