https://www.dropbox.com/s/uo07w8783thrbb7/M739.zip?dl=1 (M739)
https://www.dropbox.com/s/111ywodqh5jueel/M6H2.zip?dl=1 (M6H2)

Copy each Dropbox link from this Pastebin, open Pac Editor, click the models of the LMG / pistol, and in its model path, paste the associated link. It'll then download them to your client, and if all goes well, they'll show up again with no missing textures or download aborts.