Yeah. The guns in a typical WW2 bomber were M2 brownings...which are less than 100lbs. It's the square-cube law in action (twice over). Going from a 12.7mm to

Yeah. The guns in a typical WW2 bomber were M2 brownings...which are less than 100lbs. It's the square-cube law in action (twice over). Going from a 12.7mm to a 20-25mm bullet... twice the diameter, four times the crosssection, eight times the mass.