Exactly what it says in the tin. One my mandalorian players wants to buy a flame thrower attachment for his Mando armor. I already have the stats for Boba Fett's flame thrower which is what I'm basing it off but how many Hard Points do you think it would occupy?

On a secondary note, what rarity should it have, and what kind of mods?

I'd say disregard mods, treat it like mounting a blaster pistol on your wrist. Generally, wrist mounted weapons (retractable wrist blades, whipcord thrower, etc.) take up one HP.

I came up with stats for Mandalorian vambraces, if you are interested:

Mandalorian Vambraces: sold separately, 500 credits apiece, rarity 8/special. Each can hold 3 of the following: Retractable Wrist Blades, Portable Plasma Shield, Repulsor Blast, Dart Shooter, Micro-Rocket Launcher, Compact Flame Projector, and Whipcord Thrower. Each vambrace has an encumbrance of 1 (regardless of mountings). Mounting vambrace(s) on your armor costs 1 HP, whether you have 1 or 2.
Wrist blades, portable plasma shield, micro rocket launcher, and the whipcord thrower are all in CotR.
Dart shooter: Ranged (Light); dam 4; crit 3; short; Accurate 1, Linked 1, Pierce 3, Limited Ammo 8. 400/6.
Repulsor blast: Ranged (Light); dam -; crit - ; short; Blast -, Concussive 1, Disorient 3, Knockdown, Slow-Firing 2. 650/8.
Compact flame projector: Ranged (Light); dam 5; crit 2; short; Blast 2, Burn 2, Pierce 2, Vicious 3. (R) 750/8.

Dangerous Covenants, the Hired Gun sourcebook, has the following two mods that might work:

Weapon mod

Armour mod:

If neither of them are exactly what you're looking for you can always use them as a base to make your own!

2 hours ago, c__beck said:

That + Tinkerer Talent + Firecaller light flamer = Wrist flamer.

Just think of the the fun you can have with a Despair 🤣