I'm going to build an AR (my first one of course) and want to make sure it will work the first time out and always there after. It will be mostly used for target/plinking and home defense, I believe in the 16-inch barrel length, mostly open sights, in the NATO 5.56 caliber, of course as inexpensive as possible without being "cheap", and as light as possible - therefore the following questions: What barrel twist (i.e., 1-7, 1-9, 1-10 etc.)? Chrome lined chamber and bore? What are better parts then not (i.e., what to stay away from)? I'm sure there are more questions I'll have as I start ordering parts for the build, and some may tell me to just buy "X Y Z" brands rather than do a build, but I have tons of time and little dollars (doesn't everyone now days), and just like building thing. Thank you for any directions and/or comments.