Just about every picture I saw of their "military-like presence" after the Hebdo attack showed modern sporting rifles with no magazines inserted, nor did they show magazines anywhere on the person sporting the rifle.
I did see one M1-Carbine in the bunch that looks like it had a standard mag, but not one of the newer rifles looked to be loaded with anything but wishes.
As far as rifles go, the police mostly had old mini-14s and a handful of HK G36s (perhaps the only terrible German weapon). Then the French Military carry the FAMAS, which has been in dire need of replacement for over twenty years.