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9/22/2017 12:11:25 AM
Posted: 9/9/2005 7:34:12 AM EDT
What barrel length is the TA31 donut reticle dialed in for?
Link Posted: 9/9/2005 8:16:37 AM EDT
at the top there is the trijicon banner

click on it and you will find what you want to know along with a lot of info you dont.

there is also tacked threads at the top to browse through as well
Link Posted: 9/9/2005 10:22:29 AM EDT
Just found this myself:

What bullet was used to calibrate the ACOG scopes?
The TA01, TA11, & TA31 (.223) were designed for the 5.56mm, 20 inch barrel, 55 grain bullet, and M16/AR15 carry handle mount. The TA01B & TA11C(.308) were designed for the 7.62mm, 20 inch barrel, 168 grain bullet, and M16/AR15 carry handle mount. The TA01NSN was designed specifically for the US Special Operations Command SOPMOD M4 Carbine. To meet their requirements, the reticle bullet drop compensator and range finding stadia lines were based on the trajectory of the 62 grain bullet from a 16 inch barrel, flattop mount (Picatinny rail Mil.Std.1913).

I mounted my TA31 on a LaRue ACOG mount on a 14.5" M4. I haven't gotten to the range yet.
Link Posted: 9/9/2005 12:33:48 PM EDT
Link Posted: 9/10/2005 10:52:22 AM EDT
Thanks I wanted to make sure it would work well on a 14.5"
I dont plan on shooting past 400 anyway.
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