Trijicon ACOG 4x32 BAC 300 BLK BDC Dual Illuminated Riflescope - Matte Black

The Trijicon ACOG 4x32 BAC (model TA31-C-100413) is a fixed-power combat riflescope purpose-built around the .300 AAC Blackout cartridge, calibrated with a 300 BLK BDC reticle for reliable holdovers across the round's supersonic and subsonic performance envelope. Carrying on the Advanced Combat Optical Gunsight legacy proven on U.S. and allied military carbines, this configuration uses Trijicon's signature dual-illumination system, pairing fiber optics for daylight brightness with self-luminous tritium for instant low-light and night aiming with no batteries required.

The ACOG delivers fixed 4x magnification through a 32mm objective lens in a remarkably compact 5.8-inch, 9.9 oz package. The housing is machined from forged aluminum and finished in matte Black for hard-use durability and proven recoil resistance across AR-pattern and other rifle platforms chambered in .300 BLK. Eye relief runs approximately 1.5 inches, with a generous field of view for fast target acquisition and consistent hits at distance.

The BAC (Bindon Aiming Concept) design lets the shooter keep both eyes open while moving, using the illuminated reticle as a reference point the brain overlays onto the target. The dual-illuminated aiming point draws the eye instantly in any lighting, while the 300 Blackout BDC markings provide hold points for bullet drop with common .300 BLK loads. Multi-coated optics deliver a clear sight picture, and the sealed housing is engineered to be fogproof, waterproof, and shockproof, built to hold zero through hard military, law-enforcement, and field use.

Designed for flattop AR-pattern rifles and similar platforms, the ACOG 4x32 BAC is a long-standing choice for carbine and designated-marksman roles and is fully compatible with Trijicon's family of mounts and accessories. Whether you run .300 BLK for suppressed work, hunting, or defensive use, the TA31-C-100413 gives you a rugged, battery-free aiming system that works the moment you bring the rifle up.