In this spud-tacular clip from "Mail Call" R. Lee Ermey shows off the 1895 Colt machine gun, also known as the "potato digger".

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R. Lee Ermey tours the Knob Creek Machine Gun Shoot in West Point, Kentucky.

In a Mail Call video, R. Lee Ermey answers a question from Tom of Kansas, who wants to know what the biggest gun in the world is. Ermey says to answer this question you first have to define what you mean by big; for we all know that guns like Big Bertha and Anzio Annie are big, but if you are talking total weight and size of the shell, then they are not the biggest. The Gustav gun created by the Germans, takes the cake on this one with an 80cm barrel. The Germans first used this gun in World War II; it was designed to pulverize French defensive bunkers in the early days of the war.

R. Lee Ermey is rocking and rolling after dark in this installment of "Mail Call" as he comes to us from the Knob Creek Late Night Machine Gun Shoot in West Point, Kentucky.