BLUF: Durability? Probably not...
The 9mm versions don't last...why should a .40 on the same frame? The fact that various agencies seem content with theirs is a two-fold illusion. Face it, most departments (including Federal LEO) don't really put a lot of rounds downrange and thus, do not wear out their weapons. Secondly (and more importantly), most purchasers are BUREAUCRACIES. Do you really think that after fighting for funds to replace their old weapons with some new wonder pistol (such as the Beretta), that the bean counters and executive check signers are going to go back and admit that they bought a lame horse? They would rather sweep problems under the rug and attempt shortcut solutions (such as the Brigadier). US Navy SPECOPS (read SEALs) broke their toys during normal use and cried foul. USSOCOM (a huge Dilbert Palace) attempted to fund a solution with the Brigadier. The Navy said no thanx...next stop for the contract? US Army Special Forces...didn't want them either but the contract had already been let (Big Purple Joint Dollars! Oh My!). The Navy went SIG, the Army keeps rebuilding M9s, and the Brigadier contract gets passed around like a hot potato. Any weapons eventually rammed down Navy throats are there because the money came out of a Fiscal Year budget from about 5 years ago...not because they suddenly decided the pistols were good. "Senator, I do not recall why my predecessor purchased an unwanted solution to a covered up problem...er...I mean that the M9 has always been a superb weapon...and, uh, we are just making it superblier. And anyway, what I really want to talk to this august Committee about are these really way-cool MH model V-22 Tilt Rotor Infil/Exfil Platforms...see, we can INFILTRATE new M9 locking blocks to our boys right in the enemy's back yard!"
Think the Uncle Sam doesn't waste money this way? Yeah, right...Thanks, I WILL take another hit! Pistols are fairly inconsequential to the US military (except to a very small element of people who use them a lot). After over 20 years in Special Forces (current...not retired), I have some deep seated opinions about my tools. That's all a 9mm pistol is. A tool of the trade. I have personally observed 9 locking block failures (weapon will no longer function or fire and requires tools and a drift to disassemble) since April of this year. I expect to see about 5 more within the next week or so. 42 out of 82 weapons failed last year. All weapons replaced in January 00. The most recent 9 failures are on new "refurbished" replacements received that same month. If the MC1-1 Parachute failed as often as the M9, the Army's Airborne Troops would mutiny. The Beretta is a great gun for troops who only shoot a coupla times a year...It would qualify as great gun except for the locking block failures. In the mean-time...it's a nice boat anchor. Buy a Glock. Buy a CZ. Buy an HK. Buy a SIG. Don't buy advertising and pretty finishes. Did I mention that I'd like to be re-issued a GI 1911A1 in a real caliber? Oh well, that's another can of worms...BTW, Howdy, Broken Arrow!