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.
The scope comes in a variety of colors. 
( z1 come :ARG1 ( z2 scope ) :ARG2 ( z3 color :mod ( z4 variety ) ) )