society > armed hostility > military equipment > production and development of arms > produce or develop arms [verb (transitive)] > processes in gun-making > set or correct sights (2)
transitive. To set the sights of (a rifle) by testing it with targets at known distances. Also with on. Cf. zero, n. 6, to zero in 1 at phrasal verbs.
With in. To correct the sights of (a firearm, etc.) by testing and adjustment. North American.