Only Ithaca and Parker made 28's. Elsie also chose not to play in that market, even though they made .410's. Winchester made very few 28ga Model 21's. As noted above, Fox was in Savage hands by the time the 28ga had become a bigger deal, because it was one of the 4 "official" gauges in the new game of skeet. But Savage was busy cutting costs and not about to add smallbores to its sxs line.