Magpul CTR Defect?

I brought a Magpul CTR Stock in FDE for AR-15. When I inspected it there is a spot about 1/4” in diameter on the lower brace that is not coated. The underlying plastic is visible which is a lighter shade of FDE. The spot looks like it was where the stock was attached to the plastic sprue when molded.

Is this normal? My other Magpul stocks are black so I do not know what to expect.

I forgot that I have a Magpul MOE stock in FDE. I checked it and it is completely coated.

edited: I can see how the MOE FDE is molded differently as it has a hole in the brace for the plunger that locks into buffer tube. I checked the black CTR stock and can barely see when the sprue was cut from the stock.

The interesting thing is i watched a couple of youtube videos and that spot does not show up. Anyway I have decided it is not defect and is just a part of the manufacturing process.