I'll disagree on the slide's billboard signage being laser etching.
The model# & serial number on the frame are laser etched. You can feel & see the difference.
On the slide the lettering does not have the burnt/rough texture of the frames lettering.
The slide lettering has a slightly goldish color to it & is not rough. I'll guess some type of transfer (?) which might have been done with a laser.
It doesn't look burnt-in like on the 3rd Gen's frame or the laser etching on S&W stainless steel revolver barrels.
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