like the title says I'm considering on getting a new AR but torn between building one or buy another one. My question is how hard is it to build one from a stripped lower and upper? I found a couple "complete rifles" I like but they are always out of stock or don't have this and that I like. Just kicking the idea around with someone elses opinion before I make a step forward. Looking at a 5.56 or a multi cal lower if that makes any differrence.