I was impressed with the sound quality and suppression of the Sandman-S on my AR's. Which is why I got a 2nd one. Had it not been impressive, I wouldn't have gotten the new one tonight, simply because it was FDE or MIL contract overrun. Yes, it has a certain novelty to it, but at the same time, I'm not into wasting $1,100 (total with stamp & local tax & trust) on something that is just "so-so" or average, just because it's "cool"...This isn't high school or a popularity contest. These are tools, and you want your tools to function at peak performance.
I have been VERY impressed with the Sandman-S on all of my AR's especially supersonic 5.56 and I was really impressed with how well it suppresses the subsonic .300 BLK. I know that's not really a hard thing to do for a purpose-built subsonic cartridge, but for a very thick, heavy, and robust 6.8" can (including the KeyMo mount) to make an AR (including the port noise) sound like a modern high-powered air rifle, that's just damn-impressive.
For the AR' the best mix of length and suppression with the Sandman-S...I wouldn't have just bought a 2nd one, otherwise.
I will say this, the SMS is just "ok" on bolt-actions. It's not the best can I've shot through on a bolt-action centerfire. But it does enough to mitigate hearing damage when I have it on my .260 Rem. It is a bit restrictive and does overpressure my loads that are not normally overpressure when unsuppressed. I have not tried this experiment with my Nomad-LT as my stamps have not come back in yet, so I cannot test to see if it's the internal volume of the SMS being restrictive, or just the gun being suppressed in general, that is causing this. Being a bolt-action, I would not imagine this should be happening to this level. Even my lighter loads are showing ejector swipes. Anyone else experienced this with a bolt-action suppressed and supersonic loads?