Find it here - https://doublemdefense.com/product/trijicon-acog-4x32-red-chevron-with-ta51-mount/

Factory New.

Part#: TA31F
-Trijicon ACOG Rifle Scope
-4x Power
-Red Chevron
-.223 Ballistics

Comes with:
TA51 Flattop Mount

The Trijicon ACOG (Advanced Combat Optical Gunsight) is a fixed power, compact riflescope with an illuminated reticle pattern for use in bright to low/no light. The ACOG is designed to be extremely durable and reliable. Combining traditional, precise distance marksmanship with CQB speed, many variants include a bullet drop compensated (BDC) reticle. Every feature of its design was chosen for a single purpose: to provide increased hit potential in all lighting conditions.