Watch Lock N' Load with R. Lee Ermey

In ancient times if your army had to take on a huge stone castle there was only one option: bunker busting. This included taking weapons like the crossbow and the Trebuchet! Today the siege tradition continues, with our military using high-explosives to blow the bad guys out of their foxholes. Gunny visits today's bunker busters--military engineers who bust under, over, and into enemy strongholds.

When modern warriors go toe-to-toe in combat, the weapon they rely on is the machine gun. From crude 19th-century machines to slick contemporary weaponry, Gunny looks at the engineering development of this rapid-fire battle winner.

Ever since it was invented, the rifle has played a major part in the world's battlefields. R. Lee Ermey shows how the rifle has changed since it was first invented to the complex military rifles of today.

The simple ball and powder ammo has evolved into the smokeless cartridges of today and this is all presented in picture and video by R. Lee Ermey who is more than willing to show how it has progressed over the years and how it works.

Gunny explores the history of the weapons that ruled the world for thousands of years before guns were invented. Weaponry includes the lance, Japanese samurai swords and the modern bayonet used by the military.

Gunny gets a firsthand look at the "rocket's red glare," from rockets dating back to ancient China all the way up to state-of-the-art, self-guided missiles. Weapons include the Congreve, the rocket that inspired the star-spangled banner.

R. Lee Ermey shows the viewer how the shotgun has became such an important part of the military and law enforcement arsenal and how the weapon has progressed over the years since it was first introduced and the mechanics behind the gun.

Gunny explores the history of armored vehicles -- the steel-plated, multitasking vehicles designed to do everything from carrying troops to field reconnaissance to bringing firepower to the battlefield.

Mail Call host R. Lee Ermey shows us the history of the helicopter.

R. Lee Ermey examines the history of the handgun, from flintlock pistols to the modern rapid fire pistol. Also included is a look at high-speed photographs capturing the flight and impact of a bullet.

R. Lee Ermey examines the history of the tank, which includes a fully operational WWI tank and a M1A1 Abrams battle tank.

Gunny checks out the rapid fire, lead spitting destruction of the machine gun. From an authentic hand cranking 1890's Gatling Gun to one of the fastest machine guns on the planet today--the Mini Gun--Gunny rat a tat tats his way through machine gun history while high-speed photography captures the exploding targets in incredible slow motion.

In the first episode of the season Gunny gets down to business with one of his favorites, Field Artillery. The show starts out with the Three Pound Gun that was used in the American Revolutionary War. They go on to cover various advancements of artillery throughout the years. In final sequence we get to see a prototype computer controlled canon capable of dropping multiple shells simultaneously onto a target up to 25 miles away.

R. Lee Ermey takes us on a fascinating ride through the pathology of the rifle: where it came from, who thought of it, who improved it, its victories, its defeats, its impact on history and where it is now.