A new version (1.1) of the Long Range Weapons mod is available in pcgamemods.com's KOTOR section, under Guns.

15 (7 upgradeable) new long range guns for your destructive pleasure.

Contains 8 completely new (modded firing range, base damage, critical range, etc.) types of gun that can be purchased from Suvam Tan's store on Yavin IV or constructed by T3-M4:

Type of gun (number in game) ....................... Range (meters)

Long Range Heavy Blaster(2) ..................................... 32m
Long Range Blaster Rifle(2) ........................................ 40m
Long Range Disruptor Pistol(2) ................................... 32m
Long Range Disruptor Rifle(2) ..................................... 40m
Long Range Heavy Repeating Disruptor Rifle :) (2) ......... 36m
Long Range Stun Pistol (1) ........................................ 32m
Long Range Ion Blaster (2) ........................................ 32m
Long Range Ion Rifle (2) ........................................... 40m

Download here: http://www.pcgamemods.com/se/195/0/name/)