Some of you will find the info in here interesting
https://www.nammo.com/wp-content/upl...dbook-2023.pdf
The one that caught my eye
Quote:
5.56 mm x 45 DIM TRACER (IR) 4
The infrared (IR) tracer is completely invisible to the naked eye. It can only be seen with Night Vision Devices (NVDs), giving the user clear advantages as a stealth fighter at night. Instant ignition for short combat distances.
"Status Type classified by US Army and United States Marine Corps (Mk301 Mod 0). In service with the US, Swedish, Norwegian and UK defense forces. Combat proven."
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The advantage of knowing where the rounds are going in the dark and the other side not knowing where they are coming from is HUGE