Just have read some reports of hacking and things alike, and come up with this idea. Is the following cheating method, if possible, so safe that the staff would never find out?
We know that a shotgun of L-rarity has physical damage 20-170 if on level 1. Then a hacker may consider to "adjust" it to be 185-185. See what will happen? It's definitely undefeatable, and safe- it stays within the theoretically acceptable range! If you are suspicious about its design after being destroyed in 6 such shots, then what can be done?
All above comes from curiosity, so let's go back to the beginning: is it possible to modify the weapons like that?