OP, you have the third generation GDI G1-OSM scope mount. The mount was CNC machined from 17-4 precipitation hardening stainless steel and given a ferritic nitrocarburizing coating. Surface hardness is 70 to 72 Rockwell C. Yes, it's well made. Your scope mount was manufactured between 2008 and 2016. Global Defense Initiatives, Inc. (San Diego, CA) was in business from August 2002 to September 2016.
Note: the torque specification for the mount bolt attaching to the side of the receiver is 55 inch-pounds. The screw that secures the clip to the receiver just in front of the rear sight should be torqued at 45 inch-pounds per the instructions. I have a PDF copy of the GDI scope mount installation instructions. If you send me a PM/DM with an e-mail address, I'll send you the installation instructions. HTH