Trijicon ACOG 4×32 Dual-Illuminated | M855 RCO Ret

The Trijicon ACOG 4×32 Dual-Illuminated (M855 RCO reticle) is a fixed 4x optical sight engineered for use on the M16A4 (20″ barrel) and M16/M4 (14.5″ barrel) platforms. It combines fiber-optic and self-luminous tritium illumination to provide a consistently visible aiming point without batteries. The integrated Bullet Drop Compensator (BDC) is calibrated for .223 at the specified barrel lengths and supports extended-range reference to 1000 meters. The sight is built to support rapid, both-eyes-open aiming using the Bindon Aiming Concept.

Product Specifications

• The magnification is 4x.
• The objective lens measures 32 mm.
• This model includes a Bullet Drop Compensator calibrated for .223 (14.5 or 20 in. barrel).
• The overall length is 6.0 inches.
• The illumination source is Fiber Optics & Tritium for day and night visibility without batteries.
• The reticle pattern is a horseshoe with center dot and target reference system.
• The day reticle color is red.
• The night reticle color is red (tritium illuminated).
• The sight supports the Bindon Aiming Concept for both-eyes-open aiming.
• The eye relief is 1.5 inches.
• The exit pupil is 8 mm.
• The field of view is 7 degrees.
• The field of view at 100 yards is 36.8 ft.
• Adjustment at 100 yards is 2 clicks per inch.
• The mount included is a LaRue Tactical LT799.
• The UPC is 719307312142.

Built with a forged-aluminum housing and battery-free illumination, this ACOG is specified to deliver consistent aiming reference in varied light conditions and rugged environments. Its compact footprint and calibrated BDC make it suitable for service-rifle configurations and precision shooting occasions where a dependable, low-maintenance 4x optic is desired.