The EL-16 and EL-16HFE blaster rifle from Star Wars Episode VII: The Force Awakens.
Extract EL-16.pk3 or EL-16HFE (they both replace the E-11 so you can't have both of them installed at the same time) into your base folder usually located at:
C:\Program Files\LucasArts\Star Wars Jedi Knight Jedi Academy\GameData\base
DO NOT EDIT ANYTHING IN THIS PACK WITHOUT THE AUTHOR'S PERMISSION.
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