So my next AR is gonna be a 12.5 inch barreled gun with a carbine length gas system. I’m pretty set on running an ACOG on it. If you go on Trijicon’s website there are tons of 4x options that claim to have the BDC for 5.56. I know that the model the military has used extensively on the M4 is specifically calibrated for the BDC out of a 14.5 inch barrel. Now looking at the ballistics out of a 12.5 inch barrel vs 14.5 inch barrel, there is some loss in velocity but it is not a HUGE loss. I have seen a decent amount of people running ACOGs on 12.5 setups but my question is which 4x option will matchup CLOSEST to 12.5 ballistics? I saw on a livestream Lucas from TREX arms was running an ACOG on a 12.5 and he said he was hitting steel at 400 easy with it, which is all I would expect the 12.5 to do. I’m assuming the model that will match up CLOSEST to the ballistics of the 12.5 is whichever model is calibrated for the bullet drop of a 5.56 out of a 14.5 barrel but I want to know which one specifically? And do they make that model with a green chevron or with any green options? I also was planning on running this gun suppressed full time so I’m assuming I will get some velocity back but not a whole lot. And the majority of the stuff I will be shooting and what my guns are zeroed with is 55 grain XM193. Thanks guys.
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