Trijicon ACOG TA31 4x32 Scope, Red Chevron MRAD, Dual Illuminated, TA51, Black Build your next sporting or target rifle around the straightforward operation of the Trijicon ACOG TA31 4x32 MRAD. Battery-free red chevron illumination keeps the reticle free of battery-management demands, while fixed 4x magnification gives the optic a consistent presentation every time you look through it. The MRAD reticle, matching 0.1 MRAD adjustments and included TA51 mount bring practical versatility to a compact optic with a forged aluminum housing. The 4x32 configuration provides 4x magnification, a 32mm objective and a 7-degree field of view. Eye relief is 1.5 inches, and the optic measures 5.98 inches long. At 14.9 ounces with the mount, this TA31 gives the rifle a clearly defined combination of fixed magnification, compact dimensions and battery-free illumination. Choose the ACOG TA31 4x32 MRAD for your next rifle optic. Shop this Trijicon configuration at BattleHawk Armory. MRAD Reticle and Matching Adjustment Units The MRAD reticle uses milliradian references, an angular measurement system that can be applied to different bullet and muzzle-velocity combinations. That flexibility is a key reason to choose this ACOG variant. The red chevron provides a distinct central aiming reference, and the surrounding MRAD layout gives the optic a more adaptable role across carefully configured sporting and target rifles. Adjustments are 0.1 MRAD per click, keeping the reticle and adjustment scale in the same angular unit. For the target or competition shooter who already prefers MRAD equipment, that shared measurement system makes this ACOG a natural addition to the rifle. The references are angular, so their relationship to trajectory depends on the rifle and ammunition combination. Battery-Free Tritium and Fiber-Optic Illumination The dual-illumination system combines fiber optics and tritium to illuminate the red aiming reference. Fiber optics gather ambient light, while tritium provides illumination in low light. The system operates without batteries, removing battery replacement and electronic brightness selection from the optic's routine requirements. That simplicity is a persuasive reason to choose a dual-illuminated ACOG. The red chevron gives the reticle a distinct central reference, while the MRAD layout adds angular information around it. Together, they give the optic a recognizable aiming presentation with useful reference detail. The combination is well suited to shooters who want their rifle optic to remain straightforward to live with through practice, travel and regular range use. 4x32 Fixed-Power Optical Configuration The TA31 supplies 4x magnification through a 32mm objective. A fixed-power optic keeps magnification consistent, which appeals to shooters who prefer a defined sight picture and a simple control layout. The 7-degree field of view, 1.5-inch eye relief and 0.32-inch exit pupil identify the exact optical configuration of this model. Eye relief and physical dimensions matter when selecting a rifle optic. The TA31 measures 5.98 x 2 x 2.3 inches and weighs 14.9 ounces with the mount. Those figures help establish how the complete optic will fit the rifle and relate to the stock, available mounting space and other equipment. Forged Housing and Included TA51 Mount The housing is forged from 7075-T6 aluminum and finished in matte black. Forged construction gives the optic a rugged structural foundation, and the 20-meter waterproof rating reinforces its role as durable outdoor equipment. It is a substantial engineering specification for an optic expected to handle regular carrying, transport and range use. The included TA51 mount uses the Colt-style knob configuration, giving you the ACOG and its mounting hardware in one purchase. A matte black finish keeps the appearance consistent from the optic to the overall rifle build. Match the mount to the host rifle's interface, available space and required clearance when selecting the complete setup. Included Equipment ACOG TA31 4x32 optic with red chevron MRAD reticle TA51 mount with Colt-style knobs Scopecoat (TA64) LENSPEN lens cleaner (TA56) Trijicon logo sticker (PR15) ACOG manual Warranty card Product Specifications Manufacturer: Trijicon Family: ACOG Model: TA31 Manufacturer SKU: TA31-C-100832 UPC: 719307627482 Magnification: 4x Objective diameter: 32mm Optical type: Prismatic Reticle: Red chevron MRAD Illumination: Tritium and fiber optics; battery-free Adjustment increment: 0.1 MRAD per click Eye relief: 1.5 inches Angular field of view: 7 degrees Exit pupil: 0.32 inches Dimensions (L x W x H): 5.98 x 2 x 2.3 inches Weight with mount: 14.9 ounces Mount: TA51; Colt-style knobs Housing: Forged 7075-T6 aluminum Finish: Matte black Waterproof rating: 20 meters Country of origin: USA Frequently Asked Questions Does the TA31 require a battery? No. Tritium and fiber optics provide battery-free illumination. What reticle and adjustment units does it use? The optic has a red chevron MRAD reticle with 0.1 MRAD click adjustments. Which mount is included? The ACOG includes the TA51 mount with Colt-style knobs. What is the magnification and eye relief of the TA31? It has 4x fixed magnification and 1.5 inches of eye relief. Order the Trijicon ACOG TA31 4x32 MRAD from BattleHawk Armory. Bring a rugged forged housing, a red chevron MRAD reticle and battery-free illumination to a carefully equipped rifle.