View Full Version : Trijicon ACOG TA11-D-100291 vs TA11F
I need some help from the ACOG experts here. I'm looking at an ACOG 3.5x35 to put on my ACR. Comparing the TA11-D1100291 with the TA11F, the only difference I can find is that the TA11-D-100291 is calibrated for M193 out of a 16" barrel while Trijicon's website indicates that the TA11F is calibrated for "0.223". What does that mean? Barrel length? Bullet weight? Am I missing something else in regard to differences between the two models?
I just realized I post a question similar to yours earlier. I'm also wondering what the effect will be in long distances using different ammo with these calibrations.
The M193 is 55g 5.56 ammo with more power, feet per second the "most" .223 ammo. I would say you will see very little difference down range at the effective range of these calibers. "Maybe" and inch or two at 300 yards.
I agree, but this is a military optic. I don't think it's calibrated for regular 223Rem. Even if it is, what's the muzzle velocity? What's the barrel length? What's the bullet weight?
If you look on Trijicon's website under the ACOG FAQs, it will tell you the specific conditions/ballistic parameters for each reticle and its limitations.
"The only thing new is the history you don't know".
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The difference between the D and F is the reticle, triangle for D and inverted chevron for F, both are for 5.56.
The difference between the D and F is the reticle, triangle for D and inverted chevron for F, both are for 5.56.
Actually if you look at the specific D model he's inquiring about, it too uses the chevron.
https://www.trijicon.com/na_en/products/product3.php?pid=TA11-D-100291
https://www.trijicon.com/na_en/products/product3.php?pid=TA11F
If you look on Trijicon's website under the ACOG FAQs, it will tell you the specific conditions/ballistic parameters for each reticle and its limitations.
OK, I looked at the FAQ's and can't find one that answers my question.
https://www.trijicon.com/na_en/support/faq_ACOG.php
Here are the links to each product's specifications page.
https://www.trijicon.com/na_en/products/product3b.php?pid=TA11-D-100291
https://www.trijicon.com/na_en/products/product3b.php?pid=TA11F
The only differences are that the D indicates it's calibrated for "M193 (5.56)" and the F indicates that it's calibrated for "0.223". I realize that I'm probably splitting hairs here, especially when it comes to my shooting ability, but when I'm spending that kind of money I want to make sure that I'm in theory buying the correct product. BTW, it seems like the difference between the D and F models are the same for other ACOG's as the 4x32's show the same difference on their website.
They did no say what barrel length the calibration was for. If it's for a 14.5" barrel and your running an 18" it will be off. Not a lot but off. They did mention it was with the TA51 mount so that's good. the over bore calibration should be on. IMO they need more information to get it spot on like the Trijicon TA31RCO-M4CP.
It's not going to matter. Out to 300 both will be dead on. And probably 4 and 500. I own multiple ACOGS and rarely shoot anything but 77 grain bullets and they calibrate fine to 500. Everything will be perfect to 300 ( within inches).
Bottom line, go test your gun with your AMMO then you will know if you need to hold a little high or low at 4-5-6 Hundo. The bullet won't lie. You can also play with calibrating your weapon by i.e. Shooting 1.5 inches high at 100 so your 500 yard shot is dead on for say Hornady TAP 77 gr.
Good luck
If it's not going to matter, then I wonder why they make both versions. I shoot 75% M193 and 25% M855.
If it's not going to matter, then I wonder why they make both versions. I shoot 75% M193 and 25% M855.
This is what I'm wanting an answer about, eventually I'll call Trijicon if I can't get one when it comes closer time to me buying an optic.
They made both so they can sell to Military whatever the Military wants to hear. The reason is does not matter to the civilians is you can figure out the DOPE regardless what ammo you are shooting. Trijicon is smart and knows the military wants it dummy proof. And if I had 50 bazillion rounds of xyz ammo, I would ask Trijicon to do the same to get my order.
Just my thoughts
Singlestack Wonder
12-28-15, 10:27
Trijicon does a poor job of documenting their bdc reticles on their website. They do however do a good job of explaining them when you call them.
If it's not going to matter, then I wonder why they make both versions. I shoot 75% M193 and 25% M855.
Then I would go with the "D" model. Unless your trying to hit bulls eyes at 300+ yard out you will be good. I would bet your barrel twist rate would make a bigger difference over the two bullet wights.
OK, I called Trijicon and spoke with a very helpful guy in their customer service department who told me definitively what the differences between the TA11-D-100291 and the TA11F are. According to him, the D version was made specifically for the common M193 that most people shoot. It's calibrated for a 16" barrel at about 3050fps. The F version was made for M855 and heavier bullets out of a 16" barrel with velocities in the 2850fps range. He said that they use it for 62gr, 64gr, 68gr, 75gr and 77gr bullets. So, the bottom line is that the D model is for M193 ammo and the F model is for anything heavier. He actually talked me in to trying the version with the green chevron, so that model is actually TA11-D-100293. Thanks everyone for your help. I'll let you know my impressions.
Sweet. Lot's of 55gr ammo out there with the same or close ballistics at a good price too.
TacMedic556
12-28-15, 18:23
I need some help from the ACOG experts here. I'm looking at an ACOG 3.5x35 to put on my ACR. Comparing the TA11-D1100291 with the TA11F, the only difference I can find is that the TA11-D-100291 is calibrated for M193 out of a 16" barrel while Trijicon's website indicates that the TA11F is calibrated for "0.223". What does that mean? Barrel length? Bullet weight? Am I missing something else in regard to differences between the two models?
Trijicon repeatedly states that the difference in barrel length and ammunition of results in differences about the thickness of the stadia/reticle lines themselves. I would imagine those two are the same. Both state 5.56 (.223) zero, the only question is what bullet weight and barrel length. Some of the TA11s are designed for the SAW from what I have read and in the black area on the outer ring when you peer through them it will say "M249". Do that in a gun shop selling ACOGs, they seldom know that it is written in there on the inside. Some will say "M4" and so on. My TA01NSN is for M855 (62gr) out of a 14.5 inch barrel. On a different note, I would look at the TA11J. The cross hair reticle is superior on it in my opinion.
I was finally able to place an order for the TA11-D-100293 model. I've been looking for one for months. I used Grab-a-gun's email notification months ago and received a notification today. I bought it immediately because I knew it wouldn't stay in their inventory. I'm definitely looking forward to seeing how it performs for me.
Fatorangecat
07-17-16, 11:54
I had a TA11F briefly and Trijicon customer service told me it was calibrated for a 62gr bullet in an 18" barrel. I never got a chance to verify it on steel at distance.
They are easy to get spot on out to 500. Just need to adjust your 100 yrd DOPE by an inch or so and you can be minute of bad guy to 500 easy.
I've done it on several loads in both 556 and 7.62. I really like ACOGS for this reason.
I received my TA11-D-100293 from Grabagun.com today. The clarity is great and the green triangle is ultra sharp & bright. I'm so glad they talked me in to the green.
https://s31.postimg.org/bonyuage3/Bushmaster_ACR_FDE_with_3_5_ACOG_left_view.jpg
https://s31.postimg.org/746dt3m2j/Bushmaster_ACR_FDE_with_3_5_ACOG.jpg
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