Lock n' Load with R. Lee Ermey was a reality television series about the development of military weaponry throughout the centuries. Hosted by actor and former U.S. Marine drill instructor R. Lee Ermey, its one season originally aired on the History channel in 2009.

In a typical episode, Ermey focused on one specific type of weapon or weapon system, presenting key advancements in its technology and demonstrating their use with the help of experts. In a holdover from his duties hosting Mail Call on the History Channel, he frequently added humor in the form of light-hearted drill instructor haranguing aimed at the viewer. He also displayed an eagerness to try out the episode's relevant weapons against a wide range of targets, particularly watermelons ("they taste better after being shot with a machine gun"), as well as glass bottles.

Episodes:

1. Artillery
2. Machine Guns
3. Tanks
4. Pistols
5. Helicopters
6. Armored Vehicles
7. Shotguns
8. Rockets
9. Blades
10. Ammo
11. Rifles
12. Machine Guns (part 2)
13. Bunker Busters