Don't know about a flash can, but I have a 5.5" flash hider pinned and welded on a 9 mm upper and I clean it the same as cleaning the chamber/barrel. Even on removable flash hiders, the only time I have taken one off was when I was going to replace it with something different.

So no, I don't think you would "need" to remove it and would be fine with it permanently attached if needed to be legal.

Last edited by wmd; 10/11/20 12:12 PM.

"Any way you look at it, most of the problems facing baboons can be expressed in two words: other baboons" -
D.L. Cheney and R.M. Seyfarth