One of the first tricks I learned when I carried a 1911 was how to cycle the slide one handed. You catch the muzzle end of the slide on the edge of the opening of a flap holster and push down hard, the barrel going to the inside and the stiff edge of the holster holding the slide immobile. The same can be done with a stiff leather belt. Takes practice but it works.
I don't think you can do it with a full length guide rod. I might be wrong though.