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With regard to firearms, the term iron sights refers to the open unmagnified sighting system which comes as standard with most weapons. This usually consists of some form of v-notch or peephole rear sight and a simple front sight post. The rear sight may be adjustable for windage and/or elevation. For precision applications such as hunting or sniping the iron sights are usually replaced by a telescopic sight, and for target shooting and combat operations low-power magnified or unmagnified optical sights such as red-dot or reflex sights are increasingly common.
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