A general question about economy of actions in 5E. In general, is there a way to switch from one weapon to another and still attack in the same turn?
You can go with the following rule from Basic:
"You can also interact with
one object or feature of the
environment for free, during either your move or your
action. For example, you could open a door during your
move as you stride toward a foe, or
you could draw your
weapon as part of the same action you use to attack"
Dropping an object can hardly be considered an interaction, and is normally just handwaved. So you can drop your weapon #1 and draw your weapon #2 in your turn without taking any action.
Probably by the RAW if you want to carefully sheather weapon #1 before drawing weapon #2 (so altogether a "proper" weapon switch) your DM may require you to use your action, and therefore you don't attack in this turn.
But check with the DM because many DMs wouldn't give a




about this rule and would let you switch for free. It's hardly game-breaking anyway.
More detailed example, if we get one movement, one standard, one extra and one free action in one turn, does that mean we can no longer use drop object as a free action and then use that same free action to interact with an object (draw weapon) and then attack with the standard?
You should get used to 5e terminology of actions, so that you will avoid misunderstandings with others:
- movement is not a separate action (more similar to 3.0 than 3.5)
- "action" is your main activity
- "bonus action" is the extra you
might have from special abilities (always max 1/turn)
- "reaction" is out of your turn, and always triggered by external events (always max 1/round)
- no such thing as a free action, but rather minor stuff that you can safely not count