I am looking at getting an AR this spring. I'm not saying that I am not open to suggestions but I have 2 on my short list. The S&W MP 15 Sport and the Colt M4 6920. What do the experience AR people think? It will never be a 1000 round a year gun. Maybe some hog hunting and self defense. Kind of like the Bushmaster M4 Patrolman also.