I've been reading all that I can find on the various ACOG models, but wanted to get some direct feedback here on the rifle forum. I was originally looking to purchase one bundled with the Red Dot or Doctor Optics option, but since I'm using a AR-15 with a 16" barrel, am now leaning toward the TA31RCO-M4.
Do any of you use these optics on your rifle? Does the calibration for 16" barrel really make that much difference?
Any favorite reticles?
Do any of you use these optics on your rifle? Does the calibration for 16" barrel really make that much difference?
Any favorite reticles?


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