SMLE. ETA Its definitely not this! Sorry about that. It took three layers of stupid to put up this post! How come nobody beat me about the head and shoulders? Been dreading this all day and nothing? Come on guys!
Eleven hours after I posted this (originally in the form of "SMLE?") I remembered that the +0.031", 0.047", 0.062", and 0.078" sights that I remembered were from sighting in my semi-auto BREN. Why it didn't register at first? No idea! But it woke me up from a sound sleep...