Meprolight FT Bullseye Sig Sauer P365 Front Sight - Green - The Fiber-optic Tritium combination enables instant and accurate shooting in all lighting conditions with no batteries needed. The Fiber-optic used in bright light or day shooting and the premium-grade Tritium provides instant illumination at night or in low-light conditions. Smallest optical sight in the world based on patented optical illumination Superior visibility in all lighting conditions No front sight needed Fast and intuitive target acquisition