Trijicon Fiber replacements feature similar fiber optic materials used in several Trijicon® fiber optic scopes and sights, including the battle-proven ACOG®. Trijicon® Fiber replacements are purposely engineered to bring the absolute brightest aiming point while retaining strength and maintaining a refined sight picture. Trijicon® Fiber Sight replacements are 0.060" in diameter and will work with any fiber sights on the market that accept this diameter fiber.