Some weapon aiming sights (e.g. FN FNC) require the user to align a peep sight (rear, nearby sight, i.e. which will be out of focus) with a tip (which should be focussed and overlaid on the target) at the end of the barrel.
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The AK5 is a modified version of the Fabrique Nationale 5.56 mm carbine (FN FNC) produced with a folding stock and an option to mount the SUSAT sight from the British SA80.