Trijicon ACOG TA31 4x32 MRAD

The TA31-C-100832 is the classic 4x32 ACOG body with a new red MRAD chevron tree reticle. Trijicon announced it on October 14, 2026, alongside an LED 4x32 and two 3.5x35 MRAD models. Instead of a bullet drop compensator calibrated to one cartridge and barrel length, the reticle uses consistent MRAD subtensions so the shooter assigns holds from their own rifle and ammunition data.

That matters most on rifles that do not match a stock BDC: 300 Blackout running both supersonic and subsonic loads, suppressed carbines, short barrels, and non-5.56 intermediate cartridges. A mil-based tree also pairs naturally with ballistic apps that output corrections in mils.

Everything else is the familiar TA31 package. Fiber optics illuminate the chevron in daylight and tritium takes over in the dark, so there is no battery or switch. Trijicon lists 1.5 inches of eye relief, a 7 degree field of view (36.8 feet at 100 yards), a forged aluminum housing, 14.9 ounces, and submersion to 66 feet. It ships on the TA51 flattop thumbscrew mount.