Poly rifling, DA/SA
Set up for IPSC - Production Class
Not sure on the lockup.
If the barrel is cone shape with the largest at the front, that's the cone barrel lock up. When the slide is locked back it rattles a bunch when you shake it. Slide forward, not a hint of rattle. The single/double action trigger has a different single action than the SAO too. Straight SA works a heck of a lot better for me.