So, what do I look for in one of these? I want it to be a 5.56 /.223, that's about all I know. These things have so many options I simply don't know where to start. I'll mainly use it for target shooting/plinking, no competition or hunting use. I want to buy a complete gun, I don't have the time or knowledge to piece one together. I'm not looking to outfit it as a full blown tactical rifle, I'll most likely put a decent red dot on it and nothing else. What type of mags should I purchase? I also don't want to break the bank, would like to keep it under $1000.00 if possible. Educate me fellas...