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Glossary
GLOSSARY / DICTIONARY
A B C D E F G H I J L M N O P R S T V W Z

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 Term Definition
Objective Lens The objective lens is the lens closest to the object being viewed.  
Ocular Lens The ocular lens is the lens closest to your eye.  
Out of Battery It refers to the status of a gun before the action has returned to the normal firing position.  
Over Under (OU) A double barrel gun where one barrel is positioned on top of the other.