They use a device called the "loin extractor", a harpoon-like projectile that attaches to the target's crotch and electrocutes them. It is unknown how the device actually "extracts" the loins, but it likely grapples the loins when electrocuting the target and rips them off afterwards. When Lavona fired the weapon at Nathan during a concert in "Klokblocked", Murderface jumped in the way and was hit instead. Although the weapon did not actually hit Murderface's crotch, just his bass, he was mildly shocked and a charge was shot back through the weapon which sent Lavona flying completely out of the concert arena.