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TA31-D-100288 Trijicon ACOG 4x32 Dual Illum Red Chevron M193 Ballistic w/TA51

Manufacturer: Trijicon
SKU: TRI100288
Manufacturer part number: TA31-D-100288
UPC: 719307306882
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This 4x32 BAC ACOG scope provides a dual-illuminated reticle using fiber optics and tritium for a bright aiming point in any light condition. The ranging reticle is calibrated for M193 ammunition (5.56, 55gr FMJ, common military surplus) fired from a 16" barrel. The chevron reticle is designed to be zeroed using the tip at 100 meters and the BDC goes out to 800 meters. The width of the chevron at the base is 5.5 MOA which represents 19” at 300 meters. This allows range estimation for silhouette targets.


  • Thumbscrew Flattop Adapter (TA51)
  • 4x32 Scopecoat (TA64)
  • Lanyard Assembly for Adjuster Caps (TA71E)
  • LENSPEN (TA56)
  • Trijicon Logo Sticker (PR15)
  • ACOG Manual
  • Warranty Card


  • Always On, Always Ready
  • Rugged, Reliable Housing Design
  • “Both Eyes Open” Design
  • Outstanding Clarity
  • Exact Target Distances & Holds
  • Combat Proven
  • Shock-Resistant
  • Waterproof


Weight:15.1 oz. (428.08g)
Objective Size:32mm
Reticle Pattern:Chevron
Day Reticle Color:Red
Night Reticle Color:Red
Bullet Drop Compensating (BDC):Yes
Caliber:M193 (5.56)
Bindon Aiming Concept (BAC):Yes
Illumination Source:Fiber Optics & Tritium
Power Source:Fiber Optics & Tritium
Eye Relief:1.5 in. (38.1mm)
Exit Pupil:0.32 in. (8.13mm)
Field of View (degrees):
Field of View (feet):36.8 ft. @ 100 yds. (12.27m @ 100m)
Mount:Flattop Thumbscrew Mount (TA51)
Housing Material:Forged Aluminum
Finish:Matte Black