GarandThumb takes on a topic here that there is not a lot of information on. What are the major differences with AR15’s using high end top of the line components vs. the technical data packages that make up the military’s current M4 set ups.
There’s a myriad of options now to set your rifle up as you wish. You can run near military technical data packages or trick it to the 9’s, its ultimately up to you.
Pro Tip: Whatever you set up, even an M16A1/A2, if you spend the ammo learning to shoot it you’re going to be ahead of anyone who’s just dropping all their cash on accessories. An M16A4 with iron sights is still one of the most comfortable rifles in my hands because I spent years and thousands of rounds behind them.