The Sentinel REACH Arm is the backbone of any serious helmet-mounted optic setup. Engineered as a precision J-arm with a universal dovetail mount, the REACH Arm interfaces seamlessly with a wide range of helmet-mounted shrouds giving operators a rock-solid, tool-free connection that stays locked under the harshest field conditions.

Designed with a single standard thread pitch, the REACH Arm screws directly into your optic or adapter with confidence — compatible with the AN/PVS-14 and a broad range of similar night vision and tactical optics. No guesswork, no forced fits, no field frustration.

The REACH Arm is purpose-built to pair with the Tevin Sentinel S2 EPS Eyepiece, delivering a seamless system that positions your optic with precision and holds it there. Together they form the foundation of the Sentinel ACES Kit or run the REACH Arm standalone to upgrade your existing setup.

Built for military operators, law enforcement professionals, and serious civilian users who refuse to compromise on the gear between them and the mission.

Reach further. See clearer. Sentinel built.