Erik--
I think your right!!

I was wrong, there doesn't appear to be a muzzlebarke present.

As to muzzlebrakes I love them but don't need to be shooting them--I have hearing loss and you can sustain *additional*
hearing loss even shooting with plugs as they only lower the noise 30 DB. A short barreled rifle with brake can STILL cause additional hearing loss even with plugs!!

I shoot without brakes with plugs to protect what hearing I've got left!!