Yeah, it does. Different manufacturers (and sometimes model) vent ribs are different widths.
Here are the model number Hi VIZ front sights that will fit Mossberg 500 vent ribs.
M400, S400, BB2005, MGH2007-I, TO350
And here are the front/rear sight sets
TS1002, TB2004, FO2008-II, TT1001, C400-3
Here is HI VIZ application chart page:
http://www.hivizsights.com/shotgun-appl ... chart.html
Here are the model number Hi VIZ front sights that will fit Mossberg 500 vent ribs.
M400, S400, BB2005, MGH2007-I, TO350
And here are the front/rear sight sets
TS1002, TB2004, FO2008-II, TT1001, C400-3
Here is HI VIZ application chart page:
http://www.hivizsights.com/shotgun-appl ... chart.html