The BCM Lower 1/3 Cowitness A/T Optic Mount (model BCM-OM-AT-271) is built for the Trijicon MRO, using BCM’s Angled Torque (A/T) clamp design to deliver roughly twice the rail clamping force of a legacy horizontal interface.

Key Specifications

• Fitment: Trijicon MRO
• Design: Angled Torque (A/T) triangulating clamp, about 2x the clamping force of a legacy horizontal interface
• Material: 7075-T6 billet, hard-coat anodized per Mil-A-8625F
• Hardware: Steel alloy clamp and nut, Nitride-hardened
• Recoil Control: Multiple integral recoil lugs to preserve zero
• Torque Spec: Do not exceed 65 in-lb

Frequently Asked Questions

What’s the maximum torque for this mount’s hardware?
BCM specifies not to exceed 65 in-lb on the mounting hardware.

What optic is this specific mount built to fit?
It’s sized for the Trijicon MRO.

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