I grew up hunting, but currently I don't hunt. Used mostly shotguns for hunting. Shoot clay targets semi-regularly (again shotguns). Served 5 years as a Marine, but was Avionics so I only received basic training with the M16. I currently own a Beretta PX4 .40 S&W (home defense) and 2 shotguns. I have recently developed an interest in getting an AR. I have a buddy who has several, but he lives a good ways away so testing his out isn't an option. I had originally thought to get a 7.62/.308 win AR in case I ever did decide to go hunting with it; but have settled on the 5.56/.223 rem because it seems to be a much more universal/versatile system. Also prefer 16" for versatility, and max range I'm looking to cover is 300 yards. I am looking for versatility more than anything. In the event of SHTF/TEOTWAWKI I'd like to have a rifle that is suitable/adaptable to most scenarios, other than that it will just be a range toy. All research has been online, and none of it is fielded. So far I like the three firearms in the title, but I am looking for some advice that will help me decide. Sorry for the long post, just thought background info may assist any who were willing to advise. Thanks in advance