This script adds Ammu-Nation, Pay'n'Spray and Bomb short range blips on a radar. So, when the player is away from them — they disappear. This works like that in all of GTA games beginning from VC.
In the original game these blips appear only when it is needed by the mission, and they appear on your radar even if you are really-really away from the places they represent.
Update 1.1:
-Fixed the clean-up of Bomb shop marker in Shoreside Vale. -Now phone markers for El Burro, King Courney and D-Ice display (in short-ranged style) on the radar after you pass their missions. (Idea by: ZomBearUA)