by pressing the trigger while grabbing enemies, the body part you're holding gets gibbed, torn, ripped, fractured, whatevered.
Optionally in MelonPreferences, there is a toggle for neck gibbing, to allow for compatability with the ChokeMod by BekoniX (WILL BE MAJOR ISSUES IF YOU HAVE CHOKEMOD WITH THIS OPTION OFF)
taking feedback and bug reports, discord is MajedCT