Radian Weapons does not provide that information. I recommend contacting Radian Weapons in regard to your question.
Yes, the Radian Weapons Vertex Trigger will include Milspec 0.154" trigger pins.
The Radian Weapons Vertex Trigger is for AR Platform rifles.
The Radian Weapons Vertex Trigger might work with the EPC 9mm but due to the wear on the trigger with blowback gas systems I recommend using the trigger designed for PCC builds like the one at the link below.
https://www.opticsplanet.com/triggertech-ar-9-adaptable-trigger.html
Yes, the Radian Weapons Vertex Trigger will function as intended in conjunction with the Talon Ambi 45-degree selector switch.
Yes, the Radian Weapons Vertex Trigger is compatible with both AR15 and AR10 (DPMS and Armalite) rifles.
The Radian Weapons Vertex Trigger is a single stage trigger.
The Radian Weapons Vertex Trigger features a fixed 3.5 lb trigger pull.