This ACOG (part no. 100173) pairs 5.5x magnification with a dual-illuminated red chevron reticle calibrated for .223 Rem/5.56 NATO. The chevron’s tip is designed to be zeroed at 100 meters and its base width doubles as a range-estimation reference for silhouette-sized targets further out, matching the same rugged, battery-free design found on every ACOG.

Key Specifications

• Fixed 5.5x magnification with a 50mm objective lens.
• Reticle is the dual-illuminated red chevron calibrated for .223/5.56 BDC.
• Windage and elevation adjust in 5 clicks per inch at 100 yards.
• Parallax-free design is usable from 5 yards to infinity.
• Eye relief is rated at 2.20 in.
• Lenses carry a multi-coated finish for clarity and light transmission.
• Housing is forged aluminum, with a total weight of about 25.6 oz. mounted.
• Includes a TA51 flattop mount, ACOG Scopecoat, LENSPEN, and adjuster-cap lanyard.
• Model designation is the Trijicon ACOG TA55.

Frequently Asked Questions

What distance is this ACOG’s chevron zeroed at? The chevron tip is designed to be zeroed at 100 meters, with the reticle body usable for holdover at longer range.

Does it include a mount? Yes, it ships with a TA51 flattop mount along with a Scopecoat, lens pen, and adjuster-cap lanyard.

Is this sight compatible with 5.56 NATO ammunition? Yes, the reticle’s ballistic reference points are calibrated for .223 Rem/5.56 NATO.

Buy the Trijicon ACOG 5.5×50

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