Trijicon ACOG 3.5x35mm .223/5.56 BDC (TA51)

The Trijicon ACOG 3.5x35mm is a fixed-power riflescope designed for compact, rapid target acquisition and range-compensated aiming. It is calibrated for .223 Rem/5.56 NATO and employs fiber-optic and tritium illumination to provide a visible reticle across bright to low-light conditions. The scope ships with a TA51 flattop mounting adapter and a selection of protective accessories. Built to withstand field use, the ACOG offers fogproof, waterproof and shock-resistant performance.

Key Specifications

• The optic provides 3.5x magnification for a balance of close-quarters speed and mid-range precision.
• The objective lens measures 35mm to gather light while maintaining a compact profile.
• The scope is calibrated for .223 Rem/5.56 NATO with a BDC chevron reticle for range estimation.
• The overall length is 8 inches for streamlined mounting on flat-top platforms.
• The unit weighs 14 oz to minimize added mass on the rifle.
• Eye relief measures 2.39 inches for consistent sighting position.
• The field of view is 5.5 degrees for situational awareness at 100 yards/meters.
• Illumination is provided by fiber optics and tritium for day and night reticle visibility.
• The adjustment click value is 1/3 MOA for fine zeroing control.
• A TA51 flattop mounting adapter is included for AR-style flat-top compatibility.

Engineered for shooters who prioritize dependable optics and straightforward functionality, the ACOG 3.5x35mm pairs a low-profile fixed power with an integrated BDC chevron and durable construction. Its combination of calibrated aiming marks, robust sealing, and dual-source illumination makes it well suited to duty use, competitive speed-focused stages, and precision-minded applications where repeatable performance and rapid target engagement matter.