I got here because that save's owner's username is 150120, and I decided to try that as id.
I wanted to find id:1234567 after finding id:123456, id:12345 and id:123, but then I found out the closest it'd get to it is id:1234566.
since im the best gun maker ever heres some tips... put glass around the trigger area so the whole gun dosnt spark, dont make shield cuz that grows when spakred, and put a LOT of attention to the barrel