Our GM is going to be playing this game at a camp with some young kids and we're experimenting with all different aspects of the game to help familiarize her with some of the crazier things we can do with it so things go smoothly.

I'm currently an IG-Assassin Droid and I'm starting to get into equipment modifications. I've recently equipped the following items to myself.

2 Model 53 "Quicktrigger" blaster pistols: These are both wrist mounted with the linked weapons mod.

Additionally I am going to be picking up some sort of shoulder mounted weapon.

I'll most likely be picking up two melee weapons at some point.

So I guess my question would be, how would combat work with this sort of setup? From what I understand if I have multiple weapons I can spend 2 advantage to have an additional weapon fire (1 with the linked weapons mod). Is it possible for me to essentially fire off 5 weapons if I had that much advantage?

The rule is called Two Weapon Fighting.

You choose the 2 weapons that you wish to use and then use the worst skill for that. In this case you are using 2 pistols, they both use Ranged (Light). Next you increase the difficulty by 1 to hit. Then if you get 3 advantages, you can choose to have that translated into a second hit on the same target. As this is another "hit" soak would apply again.

Using 2 melee weapons would be the same (but use melee skill). It is possible to use a melee weapon and a pistol, but in that case you use the worse of your melee or ranged skills and then increase the difficulty by 2 (I think).

Your droid, would need to choose which weapon system to use. So when you get all of your weapons, you would choose either melee, the 2 pistols (or 1 of each), or the long arm.

Also, remember that if you are using a ranged weapon at Engaged range you further increase the difficulty (+1 for Light, +2 for heavy, and cannot fire gunnery weapons)

So I guess my question would be, how would combat work with this sort of setup? From what I understand if I have multiple weapons I can spend 2 advantage to have an additional weapon fire (1 with the linked weapons mod). Is it possible for me to essentially fire off 5 weapons if I had that much advantage?

No.

As JalekZem mentioned above the rule is Two Weapon Combat pg210-11 EotE. The limitations are two Ranged (light), or two one-handed melee, or one of each. There are currently no exceptions to this limit in the RAW.

But...

There is nothing that is keeping you from narrating your PC's attack that you firing all your weapons, you just can only gain the mechanical effect of two of them (ie. Damage).

Personally i'd have no problem with firing as many weapons as you want, its still not as good as autofire.

Personally i'd have no problem with firing as many weapons as you want, its still not as good as autofire.

Which is one of the reasons I like the idea of a four-armed Besalisk with two pairs of double-barreled HH50s, or somesuch.

Visually and thematically, it is WAY OVER THE TOP , but mechanically it’s not all that bad — not only do you tend to get less hits than you do with auto-fire, but most auto-fire weapons do way more damage per hit than most Ranged Light weapons.

Its two advantage (not three) or a triumph to trigger the second shot.

So you choose a target (and declare your intent to hit with 2 weapons) you choose the lower skill to use for the check. Once the difficulty is chosen you add 1 , so if its 2 purple you roll 3 instead. If you get hit you get dmg + success with your primary weapon. Any boosts to the check (accurate for example, or from attachments) are taken from your primary weapon, you dont get any benefit at this stage from your secondary weapon's qualities.

If you have advantage left over you can use this in the normal way or take 2 advantage to trigger the second hit, which is made against the same target. You can use a triumph to trigger the second hit also. This does damage = the secondary weapon's base dmg+ successes.

Any advantage left over can be used to trigger the weapon qualities from either weapon if you trigger the second hit. This advantage could come from qualitues of the second weapon (like superior's auto advantage)

Mixing weapons types (like melee and ranged light) you take your pool you use the lowest characteristic of the two withe the lowest skill rank and you add 2 to the difficulty so two purple become 4 purple.

A house rule for 4 limbed droids and races like xexto, besalisk is that you continue to upgrade so 4 ranged light weapons used at medium range would be two purple with 3 additional purple added and as well as the difficulty increased you have to trigger two advantage for each additinal hit. In this case 6 to get all for hits against 5 purple difficulty. This was suggested by the devs on the order 66 podcast because it does scale up nicely, however it would be easier just to go full autofire junkie.

Autofire has the edge because you can hit mutilple target, and also has the record for people who consider this a cheesy min max style build.

Didn't Order66 podcast deal with similar setup in one episode? If I remember correctly, then OP might have some help from there? Sorry, I don't remember which episode.

Edit: It was episode 59 (of FFG editions) about homesteads and businesses, at Watto's black market part. Around 1:53:?? mark. They didn't give any definitive yes no answer, but some good thoughts. And it was about using four firearms at same time.