How do you get pistol upgrades in tombraider legend?

In "Tomb Raider: Legend," you can upgrade your pistols by finding specific artifacts hidden throughout the game levels. Look for the golden relics called "Artifacts" that are scattered in various locations, often requiring exploration and puzzle-solving to access. Once collected, these artifacts automatically enhance your pistols, increasing their firepower and effectiveness in combat. Keep an eye out for these collectibles to maximize your weaponry.