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Firearm Terminology Common Firearm Terminology: Definitions and Explanations. By GunsmithG Greetings, all. As I've been writing some firearms articles lately, I've recieved a number of emails and tweets asking about certain terms I've used. I apologize that I haven't done this sooner, to help alleviate some of the confusion generated by words and abbreviations commonly used in both gun-smithing

By GunsmithG Greetings, all. Here's a little info that I've found useful. This is something I would always do, even to brand new out of the box scopes before installing on the intended firearm. Every modern rifle or pistol scope that has internal adjustments has an optical zero point, that is, where the adjustments for the point of impact are centered with the tube, giving you the most adjustment