Other than the Parkhurst, did the US experiment with any charger loading systems? I have looked around and saw one that almost looked like a mannlicher clip, as well as that spring loaded magazine type, both of which seem to be foreign manufacture? But I was curious if the US army tested anything else or what the backstory for these devices might be. I am also curious as to exactly what the Parkhurst is; is it an addition that is welded on? Screwed? How does it mount? Do any of these work with .30-40?


I don't expect them to be very practical, just curious historically.