He is currently a constitutional law and firearms attorney, founder of Gun University and Rocket FFL, as well as the author of the Long Range Shooting Handbook.

[1] While studying, Cleckner joined another student, Brian Gregorio, and founded Veteran's Advocacy Group, a student organization dedicated to educating students about civilian-military relations, military careers and veterans' issues.

[2] In 2010, Cleckner also founded New Battlefront Foundation, a non-profit organization that aid veterans in their transition from military to civilian life.

In 2011, Cleckner appeared as a trainer in the second season of History Channel's marksmen competition show, Top Shot.

In a 2012 video filmed at Colby Donaldson's ranch, Cleckner shot a Barrett M82 while standing up and hit a target 1,000 yards away on his first shot.