I am getting ready to build my first project AR, and I know just enough to get into trouble (In other words, I watched a video on YouTube, so now I'm an expert).:laugh: I'm not going for "Tacticool"; I'm trying to replicate an old A2 Colt that I shot as a teen. I have an A2 upper, and my next decision is the barrel. I want a 16" HBAR, but I want the sight post as far forward as possible. I seem to remember the Colt having longer handguards than the carbines I've shot recently, but I don't know if they were mid-length or rifle-length. Do they make 16" barrels that take a rifle-length handguard?