....trigger?
It's a single set trigger.
It can be used without setting it. The pull is right around 2# In the above picture the trigger is in the standard position. In the picture below the trigger has been pivoted forward thus setting it. There is a small tab that protrudes from the center of the shoe. The trigger now will break at about 6oz.
Here's a rear view with the trigger in the set position.
Here is a pic of the only markings on it.
I've not seen this before on an XP. Who makes / made it?
hangunnr