I am 18. I originally wanted a 9mm or 40 cal carbine but buying handgun ammo is an issue until I am 21. So a decent semi auto rifle is what I am looking for. I don't know too much about them. I keep getting caught in the ak vs ar debate. Please don't turn this into one. I have heard too many horror stories about both sides. I would love to be able to handle them but some places that is an issue because they won't allow me to handle anything with a pistol grip. Something that I can convert after purchase would also be a better option. If you have any suggestions it would be appreciated. I would prefer 223/5.56 but 7.62x39 is also an option. Thanks.