If you're looking for an AR-15, I'd recommend the Smith & Wesson M&P 15 Sport II in .223/5.56.

It's both affordable, and it's a high quality rifle.

You can use this rifle for anything, including home defense. If you can ONLY have one gun, nothing is better. Don't let anyone tell you different.

http://www.grabagun.com usually has them in stock, but they are super overpriced right now.

If you're looking for an AR-15, I'd recommend the Smith & Wesson M&P 15 Sport II in .223/5.56.

It's both affordable, and it's a high quality rifle.