The weapon addy

Okay, so I know how to make weapon hacks and all, but how exactly are people finding the weapon addy? I mean, I can find it myself through a computer-done pointer scan, but I want to know if there is any way to find it manually, or some other automatic way. Just let me know

Thanks in return

Just get ollydbgr, and open CShell than find addys.
Other ways i dont know