Okay, I need some help deciding which gun to purchase. I plan on purchasing a 9mm handgun as well a .308 carbine sometime in the future. But right now, I need a carbine that I can use for home defense as well as go out to 100 yds, tops (the .308 can fill the longer range role later). Also, I'm on a budget. Because of that, I've narrowed my choices for a home defense carbine down to an M&P 15, (or some other ar in that price range), a jr 9mm carbine, or a Beretta cx4 9mm. Some things to consider... My wife is very small, so recoil is a problem, and remember that generally, a muzzle brake on an ar will make it even louder inside. Also, overpenetration of walls is not an issue.