American 4x Optic - Trijicon ACOG TA31 RCO
The Trijicon TA31 RCO is a standard issued rifle scope in US forces, designated as M150. It is used with both eyes open, unlike traditional blind sight.
via trijicon.com
In BF3 it occupies more than a third of the screen space, and has obvious tunnel effect, which results in limited field of view. And the reticle is also much bigger than it is in real life.
In the...