A few guys i pheasant hunt with both purchased tristar pointers in 28. One has shot something like 3k rounds through it in little over a year. Neither have any complaints and both are light and fit the 28 gauge well.
The BPS guns are very nice but as others have said they are not true 28 frame guns. The wing masters are svelte and I am partial because I grew up shucking an old wing master. Get your hands on both. I do think if I was going to find a pump 28 I would look at an Ithaca 37.
