I'm guessing since it was mentioned that the grenade launchers are going to be 'modified' to fire tear gas and 'rubber bullets' (lolwut?) that they are talking about the M203 or maybe the newer M320 launchers designed to be mounted under the barrel of an M-16 and not the mk19's designed to be mounted on MRAPs and other vehicles.
People need to be asking themselves why Law Enforcement agencies need to be protected from IEDs. There is no real justifiable reason for a three quarter million dollar vehicle to be rolling around American streets (and supposedly to deliver medical services no less!). Are the current SWAT vehicles no longer effective vs small arms/rifle fire? Does this mean that they are planning for the day when American citizens are forced to resort to IEDs and other guerrilla tactics? That's the question any reasonably sane and intelligent person should be asking when they hear of such news.