The duct tape on the magazines of the M1A1 Thompson jungle mags are wrong, it uses a paperback tape unlike the original clothback tape it was originally soldiers would have.
Example with a trusted reproduction company who made the duct tape, and from a YouTube channel that does extensive research on WWII history.
And examples of early production duct tape from the channel World War Two

Example of three different soldiers with jungle magazine M3 grease gun and Thompsons .

Where you can clearly see they’re cloth base tape instead of the painter blue tape the devs modeled in.
Example of the Thompson in game from INFDB.
In conclusion the duct tape used by the devs for the Thompson is wrong, and can easily be fixed by changing textures to a more fabric darker texture.
YT channel mentioned references in the duck tape chapters.