I have used the ARIS since Silencer Research posted sound reduction test results on several rifles (yes, in 223) a few years back. The old model that I started with (from George, not CPM or Black Rain) is crazy quiet. I have blown minds using bolt and auto 223, as well as putting sub 22lr through it (no, not high volume, but no matter cause the can is stainless and will take dip or ultrasonic). I have found the ARIS to be as quiet as any other 223 can, regardless of host.
The second iteration I have is from CPM. They bought out the wise Greek, George Vias. That can is disassemblable for your enjoyment.
The latest iteration will be available some time in the future from Black Rain Ordnance, who bought out CPM/HTG. Contact them for timeline.
In short, a great can at a great price. Not cheapo, and amazing results.