Hello @yonelp01
Unfortunatelly there are no any working old hacks
The only way to make money and guns its very slow and wont be very fun doing it
Use the public hack and farm as much as possible euros in Lockdown extreme and try to win some Euro capsules
You cannot make any other guns since there are only some 30 days in the shop so capsule is your only choice
If you are interested on a new account with 600,000 Euro or even 1,000,000 Euro just create a new account and using hacks level it up to Capsule level
Important thing is that you need to do this with no log outs.. yeah just register log in and instantly spam hacking Co-Op till you go to capsule level
(Capsule level = The level required by the capsule machine)
Once you do that log out from the game relog and boom your money will explode to an awsome amount of Euros
I hope i helped