The Pentagon is a good source of gear far beyond the MRAP.
The Congressional Research Service has produced a report on the militarization of law enforcement unearthed by Steven Aftergood, director of the Federation of American Scientists Project on Government Secrecy, which shows the Defense Department is a good source of gear far beyond the Mine-Resistant Ambush Protected vehicles in the news lately.
The Defense Logistics Agency's Law Enforcement Support Office provides state and local law enforcement agencies with surplus gear ostensibly for use to support the war on drugs and the war on terror.
This includes, according to the CRS report, kitchen equipment, lawn maintenance gear, computers, office furniture, bedding and tents.
Maybe there is a clever law enforcement agency out there that has figured out how to counter terrorists with a mass attack of lawn mowers.