Attacking with ANY melee or ranged weapon, and sometimes spell attack takes . There is no cap on the amount of
Attacks a creature can execute in one
Round, granted, they have the
Action Point(s) to spend on attacking. However, every subsequent
Attack is done at a
Disadvantage Stack, also known as a
Hindered Attack.
You can gain more unhindered attacks using a feat like: Relentless Attacker.