I see one bolt action with a can. Not sure of the others.
Two bolt actions and looks like an AR10 on the right.
Looks to me like 2 bolt guns, one in middle appears suppressed, and on the far right possibly some variant (speculation on my part) of Heckler and Koch G28 semi-automatic rifle (designated the M110A1 in Army use features a 16.5-inch barrel)...
The M110A1 in Army use also features a Schmidt & Bender 3-20×50 PMII Ultra Short telescopic sight and a Harris bipod...But not sure about SS using it; can’t really see enough detail...My understanding is agents have some latitude in choice of weapons used...
In competent hands, like SS marksmen, all will “git ‘er done”...
And I did see “Police” on their vest so may indeed be city LEOs...Then again, SS might be blending in and not advertising who they are...Purely a guess...OPSEC?