How to use adjustable objective rifle scopes<br>Be sure that your scope is mounted properly. Sighting-in can have been done preliminarily, but additional sighting-in will be desirable after following these steps : Know your rifle. There are actually two optical systems in a rifle scope.
Adjustable rifle scopes need sighting in multiple times.
The snippet only refers to two sightings in.
( z0 need :ARG0 ( z1 optics :ARG1-of ( z2 adjust ) :mod ( z3 rifle ) ) :ARG1 ( z4 sight :frequency ( z5 time :quant ( z6 multiple ) ) ) )
(z0 / need-01
    :ARG0 (z1 / optics
              :ARG1-of (z2 / adjust-01)
              :mod (z3 / rifle))
    :ARG1 (z4 / sight-01
              :frequency (z5 / time
                             :quant (z6 / multiple))))
Adjustable rifle scopes need sighting in multiple times .
z1 :mod z3
z1 :ARG1-of z2
z0 :ARG0 z1
z0 :ARG1 z4
z5 :quant z6
z4 :frequency z5