Probably 25 years ago I saw an ad for a BUL M5 in a gun rag. My local gun GS owner scratched his head but ordered me one. I paid $600.00 for it once the boat from Israel got here. Polymer double stack .45 with 2-10rd mags since ban was on. GS guy scratched his head yet again since I was buying new 1911 COLTs from him for same price. My BUL was a 4" Commander style that obviously had a lot of Chip McCormick custom parts like bushingless bull barrel, LW trigger, upswept grip safety, elongated commander hammer and titanium firing pin. 6 months later Kimber came out their version which was exactly like mine but in 5" and $200.00 more. Oh yeah and it had a KIMBER rollmark on the slide so that justifies the price.
Current BUL 9mm's look like they're using the CZ approach with the slide riding within the frame. I can't get a good grip on that type of slide to chamber a round.