Hello first off since this is my first post. I'm pretty new to m4 type carbines. My former service rifle was a standard a2 and I've been playing with M1s since then. I have a 6920 on lay-a-way and it will be the first of it's configuration that I will have owned.
Read articles and posts from magazines I've bought and forums across the web I have noticed people with barrels less than 16". I'm pretty sure they would need proper papers just to posses these short barrel varieties, but I wonder since I sure see what seems like a lot of people doing it.
Then also I see people adding a fixed non removable (non removable without work) device to lengthen a short barrel to 16". I got to ask What is the point?
Basically what is the skinny on barrels and there length?