I have run a KX3 flash suppressor on my Noveke 10.5" patrol rifle since 2009. With that short a barrel muzzle flash and blast are brutal, especially indoors.

When shooting on the square range, those close to me remarked that while the blast was loud, it was no where near that of someone with a similarly configured AR platform with an A2 flash hider. Additionally, much of the blast is directed down-range.

The KX3 and slimmer KX5, shine on the short-barrel rifles, i.e., less than 16 inches. They are not noise suppressors, a.k.a., "silencers", and as such are not regulated by the NFA.

About two years ago, I had Noveske replace my KX3 with the KX5 as the interior cone had worn down due to my firing schedule. TANSTAAFL.

HTH.

JPJ