[Kaylee]

I mean the commercial one, not the WWII classic. :)

I'm wondering if the floor could be sealed up, and the top milled out to allow top-loading into a fixed magazine like a typical bolt action.. seems it would slick up the carrying of the rifle some.

Is it doable, or does the bolt design not really allow it?

[max popenker]

No, it is not possible withouth a major redesign; the locking lug is located at the top, exactly there where loading port would be. check diagram (last pic) at this link for explanation http://world.guns.ru/machine/mg36-e.htm