Ok, I was having a discussion with my Lieutenant about the new XM8 rifles that are taking the stage to replace the current M16 in most platoons. As of now they are being developed for 5.56mm to have closer compatability with the M16, but my Lieutenant feels that the new 6mm SPC (6x43mm) is a far superior round, and with the development of a new gun, they should implement a new round. Discuss, I'll come back after my Euro Civ exam.