Trijicon BUIS Replacement Set for TA01NSN AC10009

Backup iron sights on a combat optic are not an afterthought — they are the contingency that keeps you in the fight if the primary optic goes down. The Trijicon BUIS Replacement Set for TA01NSN AC10009 provides TA01NSN ACOG owners with a direct replacement for the original backup iron-sight components, restoring the full sight system to proper working order when the original parts are damaged or worn beyond reliable use.

The TA01NSN BUIS Replacement Set includes both essential components of the backup sight system — a rear aluminum ghost ring and a front sight with tritium illumination. The ghost ring rear sight gives you a fast, intuitive aiming reference that works naturally for close-range target acquisition without requiring precise alignment under stress. The tritium-illuminated front sight keeps the aiming point visible in low-light conditions without any batteries or electronics required — exactly the kind of passive illumination that backup iron sights on a combat optic need to provide reliable performance in any lighting environment.

The front sight tritium illumination provides a self-lit aiming point that is visible in darkness and low light without any activation or power source. For a backup sight system that must function reliably when the primary optic fails or is unavailable, potentially under the worst possible conditions, passive tritium illumination is the right technology. The scope accessories AC10009 replacement front sight delivers that capability in the same form factor as the original TA01NSN sight components.

The AC10009 is designed specifically for the TA01NSN ACOG configuration — a direct replacement that installs correctly on the original mounting points without modification or adaptation.