I have a Sandman-S. It was my first. Very well made. The quick mount works very well and I have muzzle devices on several rifles. You can change out the 7.62 front cap (with ridiculously priced front cap tool) for a 5.56 and get just a bit better suppression for that caliber.The Dead Air Sandman-L is giving me the stank eye pretty bad right now.
It’s a bit heavy compared with the titanium ones I have but the Sandman can handle full auto (lots of heat).
If I could only have one, it would be the top of my list. It does everything .30 cal and below.