If you find any sort legendary gun from an enemy with the 'Kneecapper' perk, keep it! This gives the gun a 20% chance to cripple an opponents leg. This doesn't seem to be useful on flying enemies, but there aren't any Cazadores so no problem. Anywhere you shoot an opponent you might [i]completely[/i] break their leg, to which they will fall to the ground unable to move, HOWEVER if they have a ranged weapon they can still squirm around to get a shot at you! But if the opponent only has melee capabilties they will be lying hopeless on the ground, waiting to die or for you to get close enough so they can hit you. I have broken so many Deathclaws knee's and clubbed them to death with sledgehammers you can consider it the Wasteland's Seal Clubbing. If PETA still existed they would be hunting me down. [i]But they'd never catch me because I'd shoot their kneecaps out.[/i]