Looking for some input on a 1st AR purchase. I would like something in the m4 length, fairly basic (ie iron sights) and inexpensive/entry level. Right now it looks like I can have my choice of a M&P Sport II, Ruger 556, or a Core 15 Scout for right around the $500 mark. This is mainly for a fun/range gun. Not planning on doing any long range stuff. Would like something that I can take to the range, have for home defense, and take along on a hog hunt here in central Florida. Anyone with experience with these? Any considerations I should be taking into account? I am a complete AR noob, thanks