using the Trijicon SRO on any weapon in this game is very difficult. The reticle is insanely small, and in some cases it will even disappear for a split second because it's practically the size of a pixel.
all optics that I know of that have this issue:
Trijicon SRO
Trijicon RMR (sorta, it's bigger than the SRO but still way too small)
SIG AIR Concept Micro Reflex Dot Sight
Trijicon TA31 ACOG
Aimpoint CompM4 (w/o killflash)
Certain LPVOs specifically ones that are 34mm