TGF (Trigger Guard, FCD) is machined from solid blocks of 7075, and Type III anodized. Some manufacturers refuse to anodize in anything but black because anodizing is something of an art, each batch can be different, it's about impossible to match.
TGF colors (black, FDE and ODG) colors can and do change slightly from batch to batch. We consider colors as a function and not a means of decoration, so we don't particularly care about matching or maintaining 100% shade and hue consistency, it's an impossible feat anyway..
That said, we do pay attention to fit and finish, the difficulty of keeping consistent color hues doesn't mean we can skip QC.
TGF Randy (ODG only) works as well as regular TGF, they just have inconsistent finish, minor patches or streaks of uneven anodizing, some have a very slight (less than 0.001 in height) line along the length that is only visible in just the right angle and lighting. FCD QC errs on the side of caution, customers may never notice but we do, so they're set aside.
We know you have questions. Why is it called TGF Randy? How does a single cell amoeba get elected (and re-elected) to congress? Randy is imperfect and he hates tacos, so he gets blemished TGF named after him. As to how AOC got elected and re-elected, we believe it's a sign of sharp decline in IQ in some NY district that saw fit to elect the village idiot to office, twice.
TGF Randy has a letter R (for Randy, not reject) marked on the end of TGF, the letter is hidden once TGF is installed. We'd draw a taco but the canvas area is tiny, it'd just look like a capital D.
TGF Randy is marked down to $17 for those that don't care about cosmetic blemishes.