They make suppressorsCan't say I'm at all interested in an AR pistol. I have pistols to do pistol stuff and rifles to do rifle stuff. I live in a very rural area and I don't expect to find myself in any situation where one would be beneficial.
ANY firearm discharged indoors and at night will instantly cause dramatic sensory overload....I'm guessing a 12" 5.56 would be quite uncomfortable.
No disrespect towards y'all who have them and like them, but I'll pass.