I'm running a 10.5" noveske with a 9" seekins BAR rail. My can is an AE30 (reflex style can) so it slides over 2.5" of barrel, so about 1" of the can goes under the rail. I only shoot it suppressed, because there is no reason to shoot it loud.
I love the noveske barrel. Extremely high quality and it shoots lights out. I was shooting under a half inch at 50 yards and about 1.5" groups @ 100 with subsonic reloads (208 amax/re7) with a viper pst 1-4x. I just ordered some 125's so I'm going to load up some supers for hunting, and see how they shoot.
Can't go wrong with the noveske.