The bushing-less guns come with a take down tool (a bent paper clip will also work).
https://www.magnumresearch.com/PDF/DE1911Manual.pdf
However, it is possible field strip them without the tool, but the slide is under tension when doing so and special consideration must be given to the spring and guide rod when removing or installing the top end. With tension on the slide, installing the slide stop merits a little more care as well.
Regards,
Greg