My first 1911, A Series 70 Colt, had the "Accurizer Bushing" in it, as it was called then. And it did do just that. Ive often heard that "they were prone to breakage" but I put MANY thousands of rounds thru that gun and it was fine the day I traded it like 15 or so years later.
Im sure somewhere there are some that broke, but for a few bucks, those bushings are a poor mans accuracy job. Buy a couple or three and roll on.
Yes, that pistol was a DEAL @ $500.