Walter Clarence "Buck" Taylor, III (born May 13, 1938) is an American actor and artist, best known for his role as gunsmith-turned-deputy Newly O'Brian in the CBS television series Gunsmoke. He is the son of Florence Gertrude Heffernan and character actor Dub Taylor. Taylor graduated from North Hollywood High School, where he became a talented gymnast. Actor Guinn "Big Boy" Williams sponsored him to go to the U.S. Olympic Trials as a gymnast, but he failed to qualify for the 1960 Olympics. He served two years in the United States Navy.His first important acting role was as Trooper Shattuck in the 1961 Dick Powell's Zane Grey Theatre episode "Image of a Drawn Sword". His other early roles were in a 1964 episode of The Outer Limits entitled "Don’t Open Till Doomsday", and as John Bradford (Brad) in four episodes of the 1966 ABC Western series The Monroes.