 Bull Armory SAS-2, tack four and a quarter. Love the polymer grip, flared mag wealth, an aluminum frame, four and a quarter inch barrel, full length guide rod, deep cut slide serrations. They all come optic ready. I have a Hollison 507C on there. Lightning cuts in the slide. 18 round magazine, beautiful trigger. I think it looks super cool with the cutouts in there. It shoots great. It's been extremely reliable.