Shot Timer
A device that signals the start of a stage and records elapsed time, central to scoring practical rifle matches that run against the clock.
A shot timer gives an audible start beep and then tracks the seconds that follow, which is how time-based stages are run and scored. In practical disciplines like PRS the clock is part of the test, because a stage favors the shooter who can build positions and break clean shots quickly rather than slowly. Many timers also pick up the sound of each shot, letting a competitor or coach review the split times between rounds afterward.
The timer is what makes a par time enforceable, since the device defines exactly when the window opens and closes. That pressure is most punishing in positional shooting and on a barricade, where a shooter must get steady on awkward props before the seconds run out.