See title and attached video.

In the video, you can see on the right side of the screen that I have a black M4A1 MP buttstock in my inventory. When I open and close my inventory using the Tab key, you can see that the icon for the buttstock rapidly changes colors to grey, then back to black.

1. Have black MP buttstock in inventory

2. Open and close inventory rapidly

3. Observe the buttstock in your inventory

Buttstock should stay the color it's supposed to be, and not flash