It depends. Some guns that's my first thing done. Some guns I swear I got tons of bloodthirsties with up until no perks/attachments and then I can't get it done. A couple of times I'd get 8 or 9 out of 10 WITH no perks/attachments, then pop everything back on, and then still can't get it done.
It's not usually a pain in the ass, but when it is...s***.
GT: Cornbread4life I'm loud, obnoxious, vulgar, and impaired by "substance abuse" 99% of the time. You've been warned.