Star Wars Knights of the Old Republic II: The Sith Lords/Upgrade items, ranged

Almost all targeting scopes, and all power packs and firing chambers, can be created using a workbench with sufficient skill rank and components.

Targeting
This scope can increase the effectiveness of blasters, blaster rifles, and bowcasters. The modifications require a workbench and a weapon of high quality marked as upgradeable.

Power packs
This cell increases the energy output of blasters, blaster rifles, and bowcasters. The modifications require a workbench and a weapon of high quality marked as upgradeable.

Firing chambers
This item can broaden the beam of certain blaster types, increasing damage or possibly granting other effects. The modifications require a workbench and a weapon of high quality marked as upgradeable.

Mandalorian Chamber
Unlike the first two Marks, Mark III has an Enhancement Bonus rather than just an Attack Bonus, granting Attack Modifier: +1 and Damage Bonus: 1 of the same type as the weapon itself for 3-17 (2d8 +1) in total.