Glock has been making components and complete pistols in the US for some time now and Austrian production is not being phased out.
Tennifer is simply a trade name for a chemical process that is done in the US under the trade name Melonite. Only a materials engineer can intelligently explain the difference so that shouldn't be an issue from a consumer's standpoint. Either process is just a surface treatment to the metal - an applied finish (like Cerakote) is what gives the slide its finished appearance.
The quality of the US made pistols is indiscernible in appearance or performance.
How long have you been working for Glock USA?
