Which ACOG to get?

[Hammer_Man]

Have any of you used a 3.5x ACOG (TA11) with a 14.5” barrel? I’m building another M4, and I prefer the eye relief of the TA11 over the TA31.

[GTF425]

Have any of you used a 3.5x ACOG (TA11) with a 14.5” barrel? I’m building another M4, and I prefer the eye relief of the TA11 over the TA31.

Extensively.

TA11H is the best ACOG.

[Hammer_Man]

Extensively.

TA11H is the best ACOG.

TA11H-G is the model I’m looking at. How does the BDC line up out at distance? I plan to mostly shoot M193 and M855.

[GTF425]

TA11H-G is the model I’m looking at. How does the BDC line up out at distance? I plan to mostly shoot M193 and M855.

I never took it past 300y on paper or 500y on steel. With M855, it will work very well. I never shot M193 with it, but a run through Strelok makes it look usable out to 400y for sure.

[gunnerblue]

Have any of you used a 3.5x ACOG (TA11) with a 14.5” barrel? I’m building another M4, and I prefer the eye relief of the TA11 over the TA31.

Yes, very much. Shooting 62 gr. Speer and 64 gr. Federal the BDC matches very closely for minute-of-silhouette shooting out to 400 yards (farthest I've taken this particular combo). I also prefer the eye relief on the 11 vs the 31 followed by its little brother the TA33.

[308sako]

Typically late to this party, but 2 TAO 1NSN's and as markm said matching drops to your reticle works wonders. 11.5 and 12.5 6x45 and couldn't be the field of view is for me is the deciding factor

[ffhounddog]

Would a 3.5 TA-11 crosshair made for a .308 work on a 12.5 with m855? Velocity seems close on that barrel length.

[davidjinks]

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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I will only buy the LED version of ACOG. Absolutely the best upgrade they’ve done to this optic. Piggy back or offset RMR and you’re good to go. I like the Horseshoe or chevron reticle. I find the HS to be “slightly” more precise than the chevron, but the chevron seems to be faster for me.

[1986s4]

Have any of you used a 3.5x ACOG (TA11) with a 14.5” barrel? I’m building another M4, and I prefer the eye relief of the TA11 over the TA31.

Yes, that's my combination right now. Dead on at 100m and I've made consistent hits on a 8" steel plate at 300m. Mine is the green chevron and my barrel is a Centurion HF 14.5 SOCOM profile.

I'm going to trial it vs. my Aimpoint Comp M4 w/ SIG Juliet 4X and 14.7 Colt pencil barrel. Both are free floated with the same hand guard so it should be a fair match up. To be really fair I should also switch optics and uppers but that would too much sighting in after the switch. I'll test group size at 300m to test the barrels, ease of use and the brightness as seen by my eyes. Already I can say the .5X the ACOG gives up to the Aimpoint/SIG combo isn't a factor due to the brightness of the Trijicon sight.
Just need the time to do it now....

[davidjinks]

Have any of you used a 3.5x ACOG (TA11) with a 14.5” barrel? I’m building another M4, and I prefer the eye relief of the TA11 over the TA31.

LED version, red chevron, pinned 14.5” DD rifle. Eye relief on the 3.5’s are amazing!

I didn’t any real load work ups with the ACOG but it worked well with M193 and MK262.