The M9 was not designed to use Nato ammo. That's why there are stories, true ones (I can tell you two), of failure.
You really can't blame design for that--THAT was a manufacturing defect.
Yes, it was. The slide fracture was due to brittle steel because the US foundry did not use the same material as the Italian's did. However, Beretta modified the slide desighn to prevent it from coming apart and flying off.
The manual I received from Beretta yesterday said the 92FS was chambered for 9mm Luger, Parabellum, NATO and 9X19 ammo.
It was designed for NATO rounds.
Correct.
A design flaw means that it, in fact, was NOT designed to fire NATO ammunition. Maybe that was the intent, but due to said flaw, was not actually capable of it.
"design flaw" is an incorrect statement. It was a deviation from intended manufacturing method. The design was modified to prevent catastrophic slide failure if the slides were poorly made.
This metalurgy thing that keeps being mentioned. So Beretta has such loose quality control standards that upwards of tens of thousands of handguns were shipped to the U.S. government over the course of several years and they never caught the sub-standard metal?
You don't "catch" substandard metal, it reveals itself when if fails.... ever hear of MIM parts?
The initial test the Army ran showed the M9 had an average life to failure of over 30,000 rounds. If there was an inherent defect in the design, that would have been impossible.
Neither is true. I don't have all kinds of facts and figures and I got out of the service almost ten years ago, so the Beretta doesn't really make an impact on me. The truth is that the 92 is in general a very good handgun, and has only recently been redesigned to handle the NATO ammo.
NO, the slide was modified so that if it did crack, it would not come apart and have a piece come back and hit the shooter. That did happen, although it was extraordinarily rare. In fact, I have yet to find a documented case of it, but I am told it happened one or two times so Beretta made a mod to cover it. That is the large head of the hammer pin which seats into a groove in the slide.
The locking blocks were beefed up just because they had a stress point where they cracked, although they had a very long average service life. They improved it to make them better.
The gun was never redesigned for +p ammo, it has been shooting it since the first Army tests.