I've got 70 rds of FN 5.56 M856 tracer. It's on 10 rd stripper clips, which look to be standard US issue. Headstamp is 5.56 FNB 84. This supposedly came from the M16A2 rifle trials at Ft Benning, but I can't verify that. I picked them up back yrs ago from another collector and that's the story. I've got a picture of them and can send via email. No PayPal, certified funds only. Email will get the quickest response. Asking $150 shipped to the lower 48.
Edited: Open to offers, as this is or was at 1 time collector stuff.