I've been looking locally for an affordable (not panic priced) AR lower for the last few weeks and found one locally. It comes with name brand components aside from the buffer & buffer tube, which are from Omega Tactical (mil spec buffer tube). I am wondering if anyone has any experience with this brand? Are their buffers and tubes up to par with other brands? Any input would be appreciated.

No but just look for one that is 7075 Aluminum alloy not 6061 which is not true mil-spec.

But you can order ones online that are not expensive and are good quality.