I have an HTA integral and it will let an occasional Remi bulk ammo crack. It is pellet gun quiet and is a movie quiet (116-120 metered) with bulk ammo. CCI subs are just stupid quiet and bullet thump is loudest thing you will hear. I talked with the HTA owner and he said the same thing I have heard several times in that the blank to machine an integral T/D barrel makes it too expensive. Don't let the simple design of the HTA fool you, it works very well.