Late for this but will put it here anyways for others
The link "vampytwist" dropped up here in comments works
First put the downloaded folder in "mods" folder directly at BO3 directory
Now pay attention you must change this downloaded folder name to "bo1_guns"
Now go inside it and create another folder name it "zone" and cut all the files in the mentioned bo1_guns folder and paste them in the newly created zone folder
Now run the game and load the mod
It doesn't work for MP at all and you can't see them in ZM weapon kits tab
But they work on all ZM maps perfectly and as soon as you enter any map you're given M1911 and all the good stuff
The link "vampytwist" dropped up here in comments works
First put the downloaded folder in "mods" folder directly at BO3 directory
Now pay attention you must change this downloaded folder name to "bo1_guns"
Now go inside it and create another folder name it "zone" and cut all the files in the mentioned bo1_guns folder and paste them in the newly created zone folder
Now run the game and load the mod
It doesn't work for MP at all and you can't see them in ZM weapon kits tab
But they work on all ZM maps perfectly and as soon as you enter any map you're given M1911 and all the good stuff