they can actually cause more stress since the recoil spring dynamics change when one is installed. not to mention the little bits of the buffer getting wedged everywhere if it decides to come apart.
a properly functioning 1911 does not need this gimmick.
"Gun control: The theory that a woman found dead in an alley, raped and strangled with her panty hose, is somehow morally superior to a woman explaining to police how her attacker got that fatal bullet wound." — L. Neil Smith