Oh, Gail, you should have done your homework!  How many crimes have been committed with silenced weapons? (Keep in mind, silencers are not that hard to build from scratch!) (actually they "suppress" sound, they aren't completely silenced, and the DON"T silence the sound of the bullet, just the report of the shot!) As to "armor-piercing bullets",if the concern is about police ballistic vests, those are "bullet resistant", because for every threat level, there is a round that WILL penetrate the vest, without being "armor piercing". Even the top level "ceramic plate" can shatter with the first strike! Mark Kelly should have stayed in space, "you don't see gangs running around...with silencers"...Really? How hard do you think it would BE for them to get them now? They have no problem getting the firearms! What a useless tool! (Kelly, not the silencer)  If they were worth using, they'd be using them. I've lost some hearing, current means don't work all that well if you shoot a lot!