Why else would civilian agencies need select fire weaponry other than to quell the masses when the administration decides to suspend elections and name itself supreme dictator and round everyone up that doesn't agree with it.
http://www.infowars.com/leaked-u-s-army-document-outlines-plan-for-re-education-camps-in-america/
http://www.infowars.com/leaked-u-s-army-document-outlines-plan-for-re-education-camps-in-america/