Fab defense dropped 1st impression - FAB Defense GL-CORE AR-15/M4 Skeleton Style Buttstock For Mil-Spec/Commercial Tubes

I bought this to replace my CA edition Springfield Saint ffh Option Zero stock (i've installed Juggernaut Tactical mag lock kit). The MSR is brand new, just received today. I was interested in this stock because of the mil-spec and commercial buffer tube adjustment tabs... As I modify this rife, I can adjust and reuse the same stock. However, this is where Fab Defense dropped the ball with their quality control. I received the stock with the commercial tabs installed and went to switch out for the MilSpec but fab defense sent 2 left side tabs. So, as the rifle sits... This stock is useless without dealing with severe rattling. Optics planet was great with getting a replacement in the mail today. However,This was my first fab defense purchase and their quality control issues would cause me to think twice before buying their product again.