Ive had enough of the M16 varient weapons from my stint in the service. If i ever hold one in my hands again it will be too soon. For home defense, im happy with a remington 870. It's all i need to protect my home from the wouldbe intruder.
http://mountaingunworks.com/870p_hqxf.jpg
(google image search, i dont have any pictures of mine at home)