According to the Internet Movie Firearms Database...

"The tan frame is not available to auto-capable Glocks in reality, which come in either anodized or matte black only."

So, I used the Chimano 88 Lower texture (it's the exact same texture used by the chimano but Black) and got the Slide edited to match the same color.

(Secondary Effect, the Frame on the Chimano Custom will be black as well now9

If someone can make a FedNet Icon id gladly add it to the mod

Credits:
Matt101 (Slide edit)
Raymond Bees (G18 and G22 Fednet Icons)