NRA
Also: National Rifle Association
A US organization that, among other roles, writes the rules and sanctions many marksmanship competitions across rifle and pistol disciplines.
The National Rifle Association is a long-established US organization whose many roles include writing the rulebooks and sanctioning a large share of formal marksmanship competition in the country. NRA-sanctioned events span disciplines from High Power across-the-course matches to indoor and outdoor smallbore target shooting, each governed by published course-of-fire and equipment rules. Those rule sets define target dimensions, scoring rings, time limits, and the line between service-grade and match-grade equipment.
For the precision shooter, the practical value lies in those standardized formats, which give competitors a common yardstick for comparing scores and gear. The NRA shares this competition space with other governing bodies, notably the CMP, which runs its own national matches and clinics with overlapping but distinct rules. Knowing which body sanctions an event tells you which rulebook applies on the day.