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Posted: 6/15/2009 3:36:29 PM EST
I was wanting to replace my fixed front sight base with a railed gas block and a flip up front sight, but I was wondering if I need to get a specific combo to match my rifle. My upper is from M&A parts with M4 contour barrel and a flip up rear sight (YHM). I want to make sure the combo will be close to the right height because my rear sight has no elevation adjustment. Thanks.
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