battlesight zero (BZO). The elevation and windage settings required to engage point targets from 0-300 yards/meters under ideal weather conditions (i.e., no wind).
bone support. The body's skeletal structure supporting the rifle's weight.
breath control. Procedure used to fire the rifle at the moment of least movement in the body and the rifle.
burst. With the rifle's selector lever in the burst position, the rifle will fire a maximum of three rounds each time the trigger is pulled.
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