Wayne,
Thank you for the explanation. This extension has caused some confusion even on our
www.willysmjeeps.com discussion boards. The outrigger extension is listed in the US M38A1 ORD 9 parts manual as WO# 906408 but is presumably for the M170 frame but can be used on the M38A1 frame and probably was a desired upgrade when the M38A1 was used as a recoiless rifle or machine gun platform. Unfortunately neither the MWO for the M38A1C conversion nor Change 1 to the TM 9-8015-2 show this extended outrigger being used on either jeep.