I've searched and read and haven't found the answer I'm looking for. So here are my questions that I'm sure someone(s) can answer. A couple of statements. My fingers don't work so good at tedious tasks, so I can't build my own. Due to medical implants, I can't take the recoil of large caliber weapons. I have a Colt AR15 way preban in .223, but a few rounds is all I can squeeze. My carry & defense weapons are XD 9mm loaded with NATO JHP spec ammo. I use 9mm Luger (USA under powered loads, 115 gr. for practice. 200 rounds before it becomes uncomfortable. I like the AR platform and started out to buy a .22 because of no recoil, but decided on a 9mm that I should be able to use as a minimum caliber defensive weapon. The use for this will be defense of the home front - my home. So my questions - What range is an AR9 good for? I'm not a long shooter, say 0 to 150 - 200 yards. Will any AR9 handle a +p+ pressure round that is close to NATO specs. Will they generally handle a JHP or only round ball. Since I can't focus on both a target and a sight, I need a both eyes open optic sight. I have researched and decided the Rock River LAR9 is the best bang for the buck. Comments ?