i got an idea for the loadout: a concealable silencer! It will not be detected during frisks you can take it anywhere, and you can screw it on Bartolis and other handguns.
E.G. in Paris, to gain ‘legitimate’ access to the second floor, you’re going to be frisked. But as your silencer won’t be detected you can find another pistol on the second floor and attach your silencer to it. Just an idea