alisske Posted March 1, 2009 Share Posted March 1, 2009 I purchased a set of Meprolight tritium sights for my M4. The OEM windage screw on rear sight does not fit into the new meprolight rear sight. (this is the screw the gives the windage adjustment) The OEM screw is tight and I am afraidto strip it. I wanted to tap the meprolight sight to clean up the threads on it. Does anybody know the tap size? I have been struggling with it for a month or so. Thanks Anthony Quote Link to comment Share on other sites More sharing options...
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