Well that is a ***** fish and no mistake...

As Jim said, minute of Barn door, I can't for the life of me think of a single good reason why anyone would do this!

I enjoy shooting my M1A1icon immensely, but accurate it isn't, that term is of course rather subjective with this class of firearm, it was designed after all to be accurate enough "for government work".

Mount an optic and zeroing with that set up would be a frustrating affair!!