ACOG TA01NSN 4x32
US Army Research lab
<a rel="nofollow" class="external text" href="https://apps.dtic.mil/sti/pdfs/AD1064518.pdf">Effects of Sight Type, Zero Methodology, and Target Distance on Shooting Performance Measures While Controlling for Ammunition Velocity and Individual Experience ARL-TR-8594 ● DEC 2018</a>