A bit like the Cornershot, the Concealed Engagement Unit, or CEU, will allow nearly any rifle to be fired around or over an obstruction, keeping the shooter relatively safe and still allowing them to aim. Designed by Aimpoint, it doubles up with the company's red dot sight, and is held in place by a ring attachment that allows the CEU to be flipped into place or out of the way quickly and easily.

The idea behind weapon modifications like the Cornershot or the CEU is that by keeping soldiers in cover, while still allowing them to accurately return fire, that the shooter will be out of harm's way and casualties will be reduced.

Via Wired Danger Room

CORRECTION: Right you are, Naphtha. Thanks!