It's an interesting question. I agree it makes sense in CT but the politics behind it will probably be impossible to overcome. There are noise reducing shotgun barrels legal for use in CT right now. The original one was called a "metrobarrel", they are stupid long (like 60") but they cut the noise down to a fraction of a regular barrel. Other manufacturers have tinkered with the concept, the shortest one I've seen was about 40". Not really silencers because they don't have a can. Also, as with traditional silencers you need to use sub-sonic ammo to realize the most sound reduction.