How Does a 277 fury ar upper Compare to Other AR Caliber Uppers When you spend enough time around custom rifle builders or precision shooters, you start hearing the same conversations again. Someone is always looking for more speed, a flatter trajectory, or better performance at longer distances without moving to a completely different rifle platform. That is usually when the conversation shifts toward calibers. Click here for more info: https://articlescad.com/how-does-a-277-fury-ar-upper-compare-to-other-ar-caliber-uppers-91770.html