Complex sentence: The PPC is a very popular weapon among MechWarriors, especially among Clan pilots due to the improved damage and extended range of their version, called the Clan Extended Range-PPC, or ER-PPC.
Split into simpler sentences: The PPC is a very popular weapon among MechWarriors, especially Clan pilots due to the extended range. Their version of the gun is called an Extended Range-PPC, or ER-PPC.