The AAC 83 headstamp in 5.56×45 and 7.62×51 was a made by Igman of Yugoslavia for Nordac Manufacturing Corp. (NMC) in Fredericksburg, Virginia, and the initials stand for “American Armaments Corporation”. This was a deceiving contract intended for El Salvador. BHA is by Black Hills Ammunition Co., Rapid City, SD with cases made by Starline. C B is also by Cor-Bon Ammunition Co., Sturgis, SD. The LEHIGH headstamp shows that it can be either for the Blackout or the Whisper. SSK is by SSK Industries, Wintersville, OH. The D B initials on the STEWART headstamped specimen was for a South African shooter, Dave Brooks. This is a very early headstamp.