To my limited knowledge, former SAS/counter-terrorist expert & author; Andy McNab trained TC in firearms-tactics.
McNab was used often by Michael Mann(Heat, Miami Vice) to train actors & crews.
A sworn deputy/auto theft detail member also told me scenes from Colaterial were used by the sheriff's office training division for new personnel.
I'd also heard that for a long time, the US Marine Corps training center in San Diego CA used the gunfight scenes in Heat(1995) to demo gun battle tactics to new recruits.
It's been several years since I saw Collaterial so I'm a bit off with the Cruise scenes. I'd say it would take a lot of time & effort to be as skilled a marksman or be as smooth in real life.