Any AR15 experts out there

[MTB996]

I am thinking about either a S&W MP15OR (optics ready) or a CMMG M4 Carbine. They are both about the same price at CDNN around $799. I am not sure I want a pure scoped AR, so I would probably get a carry handle and site for S&W.

Any opinions on either brand for reliability and/or performance? I am not an expert at all in ARs.

thanks!