So for HK-47 I normally have a Zersium Rifle (energy) and a Verpine Droid Disintegrator (Ion) available. There is a mod which fixes this for Kotor 1 but I do not think there is a version which fixes Kotor 2. Repeater weapons do not actually get to fire twice and are no better than other ranged weapons. Mandalore gets a Mandalorian Heavy Repeater with a Targeting Scope MkIV, a Pure Rylith Power Cell and a Mandalorian Chamber MkIII (naturally! As he wears heavy armour the -1 to defence from the Mandalorian Chamber is not significant). For that reason, and also for roleplay, I have Mandalore and HK-47 use rifles. In particular, Mandalorian Disintegrators don't usually turn up very often. However you may not actually find that many of those particular weapons on a given playthrough. Theoretically those are the weapons that all your ranged characters should use.

For energy weapons I give Mira a pair of Micropulse Blasters with Beam Splitter MkIII and a Pure Rylith Power Cell for each with a Crippling Scope MkIII on one and a Targeting Scope MkIV on the other. For disrupters, the best is a pair of Mandalorian Disintegrator pistols with a Broadening Chamber MkIII, a Power Pulsator MkV and a Pinpoint Scope MkIV. Ion weapons have their uses but are not anyone's primary weapon. Ranged weapons are either disrupters or energy based. So I go for bonded plates rather than heavy bonded plates which kill dexterity for example. My preference is to go for stuff that boosts without negative aspects. Atton can handle items that require high stealth while Mira covers awareness. Bao-dur or T3 should be able to craft most stuff at the workbench by the late game.

Obviously go for the best you can make of whatever you are using. Pretty much all of what is in here is applicable to your crew as far as armour and weapons are concerned.

Kotor 2 best gear