The speed of an AR-15 bullet can vary depending on the specific type of ammunition used, but it generally travels at around 3,300 feet per second.
(It'll hit ya before you hear it.)
Sound travels 1,125 ft/s
Looks to be about 2 feet.
At about 0.3 millisecond per foot the 'shutter speed' must be around .6 MS
Is this a frame from a video??