They have an anti-armor vehicle with AT-4s and Armbrust's
They have a suppression vehicle with Dillon Aero Miniguns.
They have dual M3 .50 cal. vehicle.
They have a chemical weapon vehicle that can disperse chemical agents...mostly irritants.
They also have lots and lots of small arms including:
M203 grenade launchers and HK equivalents
6 shot 40mm grenade launcher (forgot name)
M240s/M249s and their SOCOM Mk equivalents
They have all types of true assault rifles, mainly M4s, but also G36 types.
They have an assortment of submachineguns...formerly Uzis, then Mp5s, and now FNP90s and HKMP7s
Sidearms and Shotguns include Sigs and HK M4s.....
....and this is 2008 intel.....
I am for sure that USSS can thwart a platoon sized ambush on the POTUS...probably more.