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Old February 22, 2010, 07:56 PM   #20
zippy13
Senior Member
 
Join Date: August 23, 2008
Location: SoCal
Posts: 6,442
Could someone tell me a bit about these sights that affix to a vent-rib?
There are two basic types: Fixed rear or adjustable rear, and they come in a variety of enhancements (rings, glow dots, etc.). Here's a starting point click for link
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