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Comment by Big Daddy, bcnr on September 27, 2010 at 5:19

True Texan, you are looking at the business end of the A-10 Thunderbolt, aka the Warthog. The automatic cannon pictured is the General Electric GAU-8 Avenger. I don't know how large the bolt in the center is but the cannon is a 30mm(1.181") capable of a rate of fire around 4200 rounds per minute. Bottom line: A whole lot of whoop ass.

Comment by True Texan on September 27, 2010 at 4:55

Look at the rifling in those barrels! That is cool! What size do you think that bolt is in the middle so that we get a sense of size of the barrels?