Slide locked back.
I love the way these pistols shoot and handle, though they don't carry as well as the perfect CCL pistol, the Glock 19. Like a lot of Texans, I have a Concealed Carry Permit.
Oddly enough, I chanced upon an extra barrel weight and screws that a friend of mine owned. He traded them for a Browning M2 50 Cal headspace and timing tool I found in a pawn shop near Ft Hood, Tx when we were down there teaching the army to shoot.