I tried to search some answers regarding to the use of [Tooltip Not Found] and classes with the extra attack feature and can't seem to find it and rarely see people use it in their game. I'm a Rogue 15/Fighter 5 multiclass if your wondering.

So i have extra attack action + dagger of flying which draws two daggers from it so can i like throw more daggers towards the target or it's a single action to do it?

Attack(Draw 2 daggers)+Extra Attack(Draw 2 daggers)

My DM kind of rule it for me to draw 4 daggers for "now"

So firstly - extra attack doesn't give you an extra action. It allows you to attack twice when taking the Attack action. The distinction is subtle but important.

The Bracer of Flying Daggers doesn't actually use the Attack action. It provides it's own action which allows you to take and throw two daggers. Because of this - the two features are mutually exclusive. Either you use the Bracer and throw two daggers or you attack twice with your Attack action.

Extra Attack doesn't give you another action, it just let's you attack once more if you take the Attack Action. 

Which means you definitely can't activate the Bracers again.

Danke! <3 i always thought that way since i build my character around this item and making it into a meme "RANDOM SHIT GO!!!"

Bracers of flying daggers were pretty much made for rogues. Since they dont get extra attack, this gives them a second chance to trigger sneak attack per action.

If you are a fighter though, you can use action surge once per rest to use the bracers twice in 1 turn.

when i was making this character, i think of Vax and his daggers and i thought it would a fun idea to replicate the throwing daggers build and found the item! ^^

Just bear in mind that between his custom boots of haste and spotty rules recollection, you might not be able to replicate ALL that Vax was doing xD

This pair of bronze bracers have the image of four daggers engraved onto them. When flicked, they produce and fire two razor thin daggers, using magic to guide the strike towards the targets. The daggers then vanish immediately after use. If the creature using this has an additional source of attacks, they can produce up to two additional daggers. 

Quote from Chuckstrongjaw >>

This pair of bronze bracers have the image of four daggers engraved onto them. When flicked, they produce and fire two razor thin daggers, using magic to guide the strike towards the targets. The daggers then vanish immediately after use. If the creature using this has an additional source of attacks, they can produce up to two additional daggers. 

Is that homebrew? Because that's not what DNDBeyond has for the Bracer of Flying Daggers - and it uses the most up-to-date text (unless there's been an errata in the past couple of days...?).

lol yeah absolutely is home brew - sorry i didnt notice i had that checked off , sorry all