Talley HC930735 1" X-Bolt (Low) (Hells Canyon) F .440 R .515 Height. For over forty years, Talley Manufacturing has set a standard for superior quality in the firearms industry. Our willingness to adopt cutting-edge technology in our state-of-the-art facility, allows us to continue the quality that the Talley name represents. At Talley Manufacturing, we place our customers first. Your needs are our first priority. Our knowledgeable staff works diligently to answer all questions pertaining to scopes and how they are mounted. Excellence does not end with the manufacturing of precision products. You’ll find our customer service second to none!