Possible but would have to have a way to stop the clip from going all the way down. As I have no drawing to go by I cant say for sure nor do I have th access to one to check it out, as I would be willling to cut up a E to slide intonfield clip with a notch to allow it the Parkhurst and  then stop it at the right hight to allow rounds to cycle into the mag. The last issue would be if it would hold the rounds without sliding out of the clips.