u/FMJs_for_Days

There is a weird dimple on this piece, is it evidence of metal injection molding?

I ordered a mag release for my springfield 1911, I recieved the part defective, it is missing the checkering on the button.

What disturbs me is the discription of the part says its CNC machined from billet tool steel. Where the checkering is supposed to be looks a lot like the dimple of a metal injected mold part. Is this actually a MIM part and are the hiding the fact under the checkering?