re: Official AR-15 thread

It's easy as long as you have the necessary tools (clamshell to hold the receiver in a vise and a barrel nut wrench). There are gauges to check head space once it's completed. I can't really say I would or would not advise giving it a go. I'm pretty handy and am a big do-it-yourselfer, so I felt comfortable doing it and have had no issues with my builds. The main bonus to building your own is you end up with a unique end result, mainly due to selecting some kind of billet receiver and whatever rail/foregrip you want.