[Noob-RGH] Easiest way to unlock all weapons in BO3/BO2 for offline local play?

I`m sorry as this is probably a very noob question, but i just purchased a RGH X and one of the main reasons was to finally be able to play with all the weapons and levels of the game without submiting myself to that ridiculous market system. I don`t even like to play online multiplayer and can`t enjoy the weapons locally with my friends.
The levels i can get with the DLC`s, but how about unlocking everything for offline local 4 player splitscreen play? Any input will be apreciated as i know nothing of RGH. Should i get a mod? If so, which one as everything is a bit confusing for me Lol... I dont want any other tweaks whatsoever, just the guns and swords and special weapons that were released and thats it. Isn`t there a way to import another user `savegame`or something like that?
Any topic addressing newbies in this matter would be really aprectiated also.

 

Neither do i man, believe me.
These modding guys ruin it for everyone in the multiplayer gaming.

I really only wish to obtain the weapons for offline play. Thats it! Because that Black Market is total BS! There should be a way of getting to play with those offline locally.