The laundry list of features that ARCAS adds to a rifle include features that help a soldier shoot more accurately, like passive range measurement and automatic ballistic correction. With the right sensors, ARCAS can detect where hostile gunfire is coming from, and let the wearer know of any movement seen on its video cameras. By allowing the soldier to aim through a camera connected to a heads-up display, the rifle can be fired from the hip and around corners, two kinds of shooting difficult to pull off with a traditional down-the-barrel sight.
Other features of ARCAS seem more like replacements for the radios and tablets carried into battle. These include a way to “interface with tactical Command and Control,” which is a fancy way of saying “talk to the officer in charge,” and “navigation assistance,” or a map with routes shown on a heads-up display.
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