I just bought an 08 Sunnybrook 5er from a friend and it has a 5AB/SW. I will pick it up later this month. He really likes it and he's going to put another one on his new Bighorn 5er. Different frame mfgrs and they won't interchange. I won't need it either cuz I have a LB. I don't know the frame mfgr (I forgot to look at that but I think it's a Dexter frame) but I measured the width and it replaced a 12.25" wide pinbox. FWIW, if anyone can use it, watch Craigslist Phx in about 1 month for a smoking deal. Craig