American Red Dot Sight - Trijicon RX01
The Trijicon RX01 features an Amber dot and blue lens in reality, which for video games messy graphics may not be a good idea, hence DICE made it red dot over clean lens. Notice the edge of the scopes, the real life one has more view area while the BF3 counterpart is a little more bulky. Also in darker environments the real RX01 has additional light source built in for visibility.
It's...