I have been interested in them but know nothing about them except what I read, and some of that is not very informative for the average shooter. Most of my varmint hunting is walking field edges looking for targets, how heavy is the average AR? For a new AR shooter, about how much does a basic set up (used gun?) cost? I will be scoping the rifle, is it better to remove the carry handle or use it as a flat top? I know there are lots of aftermarket parts out there but my budget would be slim to none, what are the must have accessories to make it more user friendly, reliable, and lightweight?