Mindark has stated in the past that everything 'can' drop from every mob.
Of course some things are limited to the area of the respective planet partner wereas other things can drop universe wide - leading to ul weapon drops even in space.
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According to quantum physicist we "can" all sudenly and spontanousely teleport to mars any second. Just odds are so low that u need wait longer than age of universe to experience such event.
Same is when MA say something "can" drop. I bet for purposes of such discussions we keep on what we can observe and froget wecan stil loot mod merc from feffoid