This is an interesting little relic. I don't know if it's a fantasy piece, a post war souvenir sold in trinket shops outside of the old tunnels, or an authentic GI bring-back or instructional example. Came out of a 30 year ordnance collection; one full of gems and duds. The little copper plunger slides up and down against a light spring. An insert at the end of the .223 round retains the spring. Headstamps on the cartridge are long gone and illegible, if there were any, only hammer or impression marks remain.
Has anyone seen another of these? Anyone aware of this type of item being stamped like this to identify it as an instructional trainer for EOD troops?