Yes, "slightly"... by a measure of centimeters at most. Not to the extend shown in most of the MGs (and remember, the most realistic representation is within the game itself, shown on the Thunderlord). The hand cannons couldn't be made that way though, as the center is still used to attach the cylinder (as seen in the reload animations), while the barrel on most of them is aligned with the very bottom edge of the cylinder, as seen in the second image I posted. I appreciate your knowledge and attempted explanation though.