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The "Z" arm GPMG mount is very robust, and is similar to the GPMG mount for the observer of the Lynx recce vehicle. The Ferret .30-06 MG swivel mount is again similar but just a bit different.

Not much to be said for the arm except it is 2" or 2 1/4" diameter steel tubing. There is a captured ring and block for the crosspin in place of the pintle traverse and elevating mechanism. The head is a square block with another traverse pin for the front pintle. The final fitting is a flat bar between those two pins which has nubs and teeth to hold a NATO spec' ammunition box.

The drawings pages are likely ones saved from Rob and the front view of the mount looks like one of mine.