450Bushmaster.net

was looking for something else, and came across these

if anyone's having trouble finding shims for muzzle stuff, these might be useful.

http://www.badgerridgeind.com/store/p56/450BMshim


hth

They were brought up before. They are a bit bigger than they need to be, but it's an option.
I bought 3 sets because they stated 1 might not be enough (extreme cases), and I was thinking about running em on 2 uppers. Ended up only using em on one. I am using them on a Tromix barrel and Ross 4 port brake. They are slightly oversized, but don't really care. Looking at something like a Tromix brake, might not be an issue.