It's come full circle. they now have a "Single Stack" division for the 1911/ 45 shooters. Pretty much limited to a stock pistol, (almost) mods allowed for improving reliability, sights.
__________________ “If it rolls, floats, flies or shoots, runs on gasoline or gunpowder, goes fast or shoots a big bullet and makes lots of noise, thus producing torque and recoil — it’s cool.”