Quote Originally Posted by Ned Christiansen View Post
Does anyone know, is M855A1 still considered to be "SS109" in NATO parlance? My understanding / recollection is that SS109 is a penetration spec more than a construction requirement, I know the Swiss P SS109 is made quite differently from others. This is probably from twelves years ago, not sure if the same now:
M855A1 is not SS-109. NATO Standardization Agreement AOP-4172 for 5.56mm ammunition dates back to 2008.