Can Waverly Use Peacemaker?

It has since been passed down to each Earp heir in an effort to break the Earp Curse. According to the Earp family mythology, Peacemaker can only be wielded by the Earp heir when they turn 27, which is currently Wynonna. ... However, Waverly who also has no Earp blood, was able to shoot at Rosita.

Why did peacemaker work for Waverly?

Wynonna has to verbally abuse Peacemaker to get the gun to work for Waverly since she is not the heir, which also suggests that the gun is sentient in some capacity and can have its own rules about how and when it shoots.

Does Wynonna give up Peacemaker?

Wynonna no longer has Peacemaker

As a result of the curse being broken, Wynonna is without the gun she's relied on for three seasons. But as the trailer shows, she still has plenty of weapons.