NO! Military-grade hardware (e.g. machineguns) does NOT belong in the hands of civilians, nor civil servants (e.g. police). So, YES, I categorically oppose legislation to legalize civilian machineguns.
Goddamnit, if you're too damn stupid to make a plan to use your handgun and hunting rifle to immediately obtain military-grade hardware when you start your revolution, then you're too damn stupid to be starting a revolution!
(And if I catch you trying to join my revolution, I'm putting your dumb ass out front, meat shield.)