AmeriGlo Ghost Ring 3 Dot Night Sights


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KICK4426
June 16, 2009, 02:42 PM
I recently shot a Glock 21 with this set up. It was GREAT. I am looking to purchase a set for my 21 but, I keep running into two versions of the same sight that seem the same. I hope someone can tell me the difference between the following two descriptions.

AmeriGlo +0 Ghost Ring 3 Dot Night

AmeriGlo +1 Ghost Ring 3 Dot Night

What does the +1 or the +0 mean?

Thanks

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