Greg Kinman (born 1950 or 1951),[2] known online as Hickok45, is an American YouTuber who films videos about firearms.

Over time, he expanded his presentations to include a greater variety of firearms, while emphasizing safety.

[7] Hickok45 became famous for his early videos in which he used pumpkins, watermelons and two-liter soda bottles for target practice, and cut down saplings and Christmas trees using various guns.

[9] Greg Kinman attended Austin Peay State University in Clarksville, Tennessee, where he played center position on the college basketball team for two seasons, 1970–71 and 1971–72.

[13] He decided to forgo his senior season as he felt that basketball would not become his profession; he also noted that he was unable to gain weight.