aramis wrote:It is. It's a specific feature of the Fighter, Paladin, Monk and Ranger classes. Fighters can climb to 4 attacks as a single action (and 4 more with an action surge); monks to 4 - 2 as one action, 2 more as a 1 ki + bonus action; Paladins to 2 attacks for an action; rangers to 2 in one action.
It's worth noting that this is unlike 3.x, where EVERYONE could make multiple attacks... at least once BAB is 5+.
This isn't quite true. Barbarians also get a second attack, as do some varieties of Bard and Warlock. Some Clerics can also do it (though they can only manage it a few times a day). And any Druid who turns into combative animals can get several attacks that way. And anyone can get an additional (less effective) attack as as bonus action by two-weapon fighting (on top of any attacks that don't use such an action).
It is certainly primarily a Class specific feature, but not one that's quite as restricted as this post implies (indeed, only Wizards, Sorcerers, and Rogues lack some way to get a second attack...though on the other hand, only Fighters and Monks can reliably get more than two attacks without two-weapon fighting or shapeshifting).
Just to be clear.