"If I'm in highly populates area,the use of AR rifle can result in lots of collateral damage if not handled well." Use hollow-point rounds instead of full meta

"If I'm in highly populates area,the use of AR rifle can result in lots of collateral damage if not handled well." Use hollow-point rounds instead of full metal jacket rounds to decrease penetration. But the problem is usually overstated anyway. See [1][2] below. "It is also very impractical to carry, especially if your job is not in military or security." Get an AR-15 "pistol". [3] You should be able to fit one in a decent-sized backpack. Some of them have barrels as short as 7 inches. If that's still too big, separate the upper and lower receivers. You'll just have to spend a good 30 seconds reassembling the weapon before loading a magazine. "but just realistically what kind of potential attackers one would expect to stop with it?" Looters attempting to destroy your business and livelihood, for example [4]. And that's not a problem restricted to the US; violent looters are a worldwide problem. Rural farmers being lynched for ethnic or economic reasons in Africa would probably love to have a semi-automatic weapon to even their odds against numerous attackers armed with (presumably) edged weapons or pistols. [5][6] The perpetual problem we see with gun control advocates is that they extrapolate from their experience living in metropolitan areas with far higher law-enforcement densities, push for laws that affect EVERYONE, and then end up depriving people in rural areas from the tools they actually NEED to be responsible for their own safety and security. [1]https://www.outdoorhub.com/stories/2013/11/04/ar-15-appropriate-home-defense-part-one-penetration-issues/ https://www.outdoorhub.com/stories/2013/11/04/ar-15-appropri... [2]http://preparedgunowners.com/2016/07/14/why-high-powered-5-56-nato-223-ar-15-ammo-is-safer-for-home-defense-fbi-overpenetration-testing/ http://preparedgunowners.com/2016/07/14/why-high-powered-5-5... [3]https://www.pewpewtactical.com/best-ar-15-pistols/ https://www.pewpewtactical.com/best-ar-15-pistols/ [4]https://www.thetruthaboutguns.com/koreatown-twenty-six-years-ago-the-guns-of-the-l-a-riots/ https://www.thetruthaboutguns.com/koreatown-twenty-six-years... [5]https://en.wikipedia.org/wiki/South_African_farm_attacks https://en.wikipedia.org/wiki/South_African_farm_attacks [6]https://www.newsweek.com/zimbabwe-land-robert-mugabe-white-farmers-land-reform-659611 https://www.newsweek.com/zimbabwe-land-robert-mugabe-white-f...