The small circular piece of metal (usu. brass) at the base of a bullet, where the firing pin in the chamber of a firearm hits to make a spark and ignite the bullet's powder.
Student: Why can't we use that bullet? It's a 9x19mm, isn't it?
Instructor: Yes, but it's a dud.
Instructor: As you can see, there is a dent in the primer. It was hit by the hammer, but did not spark, and therefore did not eject from the barrel.
Prices shown in USD.
Type your email address below to get our free Urban Word of the Day every morning!
Emails are sent from email@example.com. We'll never spam you.