Then you can afford to buy a new gun, that is not tainted.
For your own good, you shouldn’t obsess over this one.
This gun was used in commission of a crime and for the cost, that you yourself pointed out, it’s not worth the effort, not to mention any other trouble you may end up having.
Most people here are giving you good advice.
Let it go, buy another gun and move on, focus on your job and MBA courses.
This is not a question about your being right, which you are, this is about practicality and accepting reality that you can’t always get your way.
“God give me the courage to change the things I can, the serenity to accept the things I cannot change, and the WISDOM TO KNOW THE DIFFERENCE.”
I didn’t seek your opinion on gums. If you think any gun is “tainted” then you have psychological issues. No joke.
Seek help.