Hi, does anyone know way I can unlock all guns like kvk99m, m14 and other shi for free so I can play with it in zombies and vs bots?

First time playing bo3 i only have mp but no one is online I've been waiting for 15 mins

I’ve seen people getting it all over PS5 but is there any trusted sources for Xbox?

I booted up BO3 today and noticed stutters, whenever I slid or moved to different areas of the map, on any map my game stuttered very bad. I use the T7 patch, but it does not really make a difference, also I tried Clean Ops, and it made it worse to the point where it was unplayable. Along with that I downgraded my executable but still nothing worked, and my in-game settings are all optimized but the game is basically unplayable. A couple days ago my game was running fine, I have tried just about everything to fix it, but nothing seems to work. Any tips to fix it?