The Talon uses the Lord's Light 2, so, that is a DC weapon.
I'm guessing either there is some sort of trade agreement when its put back into production in the 3050's, or, the SL had one in the 2700's.
The Lynx uses a Defiance 1001 model.
Given Defiance also made that Zeus model, I'm betting they made the ERPPC in the 2700's too.
Nightstar also uses that Defiance model.