by David Crane david@defensereview.com 1) Trijicon, Inc. is currently making a combo optic comprised of a TA31 ACOG with a DOCTERsight monted on the top/rear, called the Trijicon TA31DOC. The TA31DOC ACOG is a BAC (Bindon Aiming Concept) 4×32 dual-illumination (fiber optic/tritium) optical gunsight calibrated for 5.56mm (5.56x45mm) flat-top rifles out to 600 meters (600m).

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