You'd need a lower parts kit (or at least a trigger assembly, as the trigger is obviously missing, don't know what else inside is), a Stock, and a complete upper from what I can tell.Shu wrote:I have wanted to build an AR-15 and am interested in this. What would I need to make this a complete M4 if possible? Sorry a newb when it comes to AR's
All of which can be purchased online without having to go through a FFL.
To the OP: Is that a Commercial or Mil-Spec Buffer tube?
Shu: You'll need to know whether it's commercial or mil-spec to purchase the right stock for it