case leght Edit
There are several inconsistencies in song to the length of the ammunition in the canon indicates that there are 2 variant of ammunition, with 40mm and 30mm case length.
but can be the 30mm variant is a retcon? in the first person M6D model is a bullet, which actually has a case that apparently is 32mm long and is 40 millimeters in total length. Zen-158 (talk) 00:01, October 22, 2012 (UTC)