"To clarify, the locking block/locking lug you do indeed mean the entire top of the chamber that locks in to the slide during firing?"
No. The "Barrel Lug" that I, and Glock, refer to is the portion of the milled barrel that is below the chamber and engages the locking block. The recoil-spring guide is seated against the front face of the lug in it's installed state.
"So Delaware cops are called 'operators' now?"
I'm using a generic term for the "shooter". If that is confusing to you, then it's unlikely you can provide any useful information to me for solving this issue.
"I'm calling Bull ***** on this one."
Feel free. However, I've got two broken barrels and ten officers who saw the malfunctions and are worried that they're carrying paperweights. Denial is not an option for them.
"I'm guessing they somehow (SOMEHOW) chambered a full-house 10mm Auto."
And you'd be wrong. All of the ammunition used by the agency is .40 S&W Speer Lawman 155Gr. TMJ and Speer Gold Dot 155gr. FMJ. I know of no way to "somehow" chamber 10mm in a barrel milled for .40 S&W. The weapon would not go into battery, since there is a 3mm difference in cartridge length.
Guys, I've been a cop for 19 years and a firearms instructor/armorer for ten years. I'm a Glock armorer and I personally own several Glock pistols. I believe in the product, but I've got an issue that I'm trying to find a resolution for: i.e. half of my police force has lost confidence in their sidearm. If you have something constructive to offer, please do so. If you have questions regarding the failures I've outlined, I'll happily answer them. Otherwise, I'll post any developments here and to anyone who sends an email. If you're just here to throw bombs, I simply don't have the time.
Thanks in advance for any useful contributions.