Finding a Reid centric fic

So, this might be a long shot seeing that I read this fic ages ago (several years ago and it might have been taken down and I can't remember the site @_@) but I'm looking for a Reid centric fic where he can actually shoot a gun quite proficiently.

I was re-watching old episodes and LDSK reminded me of that fic. I think it was Aaron who found out about Reid's proficiency on a case from a detective and that the detective had to teach him how to shoot badly. As I said, it was a long time ago.

I hope someone knows this fic :|