Re: sig sauer m400 series whos got one
Can't really say which one is the most bang for the buck, but I've owned, own and have assembled a lot of ARs since the early 90s to present. I bought one of the M400 Enhanced models new for $930 out the door, I think it's a good buy. Especially with some of the lower receiver enhancements offered.
However, I do have an issue with the rear sight that is specific to the "Enhanced" model, the windage adjustment moves a little too easily and the peep flips between the large and small aperture a little too easily. It moves easily enough I threw on another rear sight I had laying around. I intend to send the sight back to Sig for them to look over as it's definitely too easily moved to be relied upon for any serious use. With that I hope the sight is not a typical representation of this specific model.