I had to replace the one on my PT99 after well over 5k rnds, the gun was bought used before my friend had it and he put over 5k rnds before the gun came to me. It cost me little over $8 to send it to Taurus and they sent me a new one. Still a great gun and no other issues. I beleive the only difference in the models is the type of sightsI've had a Taurus 92 for many years and my son now has it. Great gun for the money and always reliable. There has been some talk about replacing the triangle shaped locking block under the barrel after a high round count, but the gun we have has no telling how many rounds thru it and is still perfect and tight as new.
I heard they use the SAME factory that Beretta used to make them in Brazil.
That is all I wanted to add. I have a Beretta. Love it. Probably would buy a Taurus for a cheaper price, but you'd have to deal with all the Taurus bashing.