Complex sentence: After fighting his way through Ma's remaining men, as well as Bushwacker by defeating him in a gunfight, ripping his weapon arm off and shooting him in the chest, dropping him several stories above the ground.
Split into simpler sentences: After fighting his way through Ma's remaining men, Punisher then fights Bushwacker who he defeats in a gunfight. To finish off Bushwacker, Punisher rips his weapon arm off and shoots him in the chest followed by Punisher dropping Bushwacker several stories above the ground.