ACOG BDC's vs. AR Barrel Lengths?

[Chopperdoctor]

Looking for info on all Trijicon ACOG's, with respect to what AR barrel lengths correspond to different model BDC's reticles. Please fee free to add and edit.

What I know:
- TA31RCO-A4 is for the USMC 20" A4
- TA31RCO-M4 is for the USMC 14.5" M4
- TA31F is for the 16" barrel ???




What I'd like to know: All others, but paticularly
- TA01ECOS - ??" barrel
- TA31ECOS - ??" barrel

 

[damndirtyape]

http://www.ar15.com/forums/topic.html?b=3&f=18&t=229420