A field experiment was conducted to determine the effectiveness of
a circular bracketing sight in improving the hit capability of the M16A1
rifle at low-light levels at short range in quick- reaction situations.
Eight riflemen fired at four pop-up targets that appeared for 2. 5 seconds
at ranges of 20 and 40 meters. The subjects used weapons fitted with
the standard sight (control) and a circular bracket sight. Testing was
conducted on the Live Fire Instrumented Range at Fort Hunter-Liggett,
Ca. , at a low-light level of 0.25 footcandles. Results showed that the
bracket sight was 42% better than the standard sight over the entire
experiment.
http://archive.org/details/fieldexperimentt00honb
Major, United States Marine Corps
Approved for public release; distribution is unlimited.