"I'm pointing this gun directly at your head. You can see that it is loaded.
I have no qualms about shooting you, from your research you already know
I've done it before and have no qualms against doing it again - to you.
Unless you cease and desist from doing XYZ, you are a dead man"
OR...
(your way)
"Hi, I'm thinking about making plans to research the procedure to buy a firearm
that I might be able to threaten you with. In my opinion, which is obviously
biased, you are doing me wrong. Instead of acting like I'm serious, I'm creating
this C/D with my friend to try to scare you into doing what I want you to
- even though I am obviously neither qualified nor equipped to carry out any
such threats, hence diminishing my leverage to next to zero. I really want you
to believe I will further my research should you not comply, as you can tell - I am serious."
One way, you soil your pants...
...and your way, you end up looking like a birthday clown trying to report the news on TV - it just does not work.