Here’s a nice two part article on the basics of the AR platform. All too often we assume that everybody else knows what we know about a particular subject and that just ain’t so, particularly when it comes to the AR, one of the most heavily customized and accessorized weapons of all times. It can get downright confusing – just ask anybody that’s piecing a rifle together for the first time.
There ain’t nothing wrong with being ignorant about a subject, but we all have a problem asking what we think might be a stupid question. This might help.
These 2 articles break everything down and gives you a basic explanation of how everything works. With this information, a build by somebody that’s never done it before doesn’t seem so daunting.