User blog comment:Cod1/U.S. Marines with AK-47s/@comment-1260687-20100409010059

@Imrlybord7: I've never used the SCAR in combat, but I appreciate the killing power of the M240; same round. The problem with 6.8mm is that there's no commonality with any other weapon systems. The 5.56mm is sufficient for automatic riflemen, but riflemen need the highest chance at a first shot kill that they can possibly get. The 7.62mm delivers that in SPADES.