Sights are typically metallic, either a V notch at the rear, and a post at the front, or a peep sight (small hole in metal disk) at rear, post at front. A scope (short for telescope) is mounted to the rifle, and has a set of cross hairs that can be adjusted up/down and left/right. It has the effect of bringing the target closer. You adjust cross hairs so they are crossing where the bullet strikes. However, simple metal sights may be preferred to a scope in certain conditions- low light, snap shooting, etc. There ARE other sights, such as the "red dot" sight- they superimpose a dot on the image of your target (only in your view- not really on the target) Unlike a scope, most do not magnify the target image.
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