I have a Yankee Hill muzzle break on my .308 AR10. What would be the best can to put on that rifle ???
Who manufactured the AR10?
What barrel and gas length.
Stock buffer?
Current ejection pattern?
AR10's are generally more susceptible to gas issues.
The OSS is the easy button. It requires little to no tuning.
The Hyperion K, Sandman-S, KGM R30, 762 rc2, etc are lower back pressure as well but not to the extent of the OSS. You will likely need to tune your gun for the others to not be overgassed.
If you don't mind mild tuning the Hyperion K is a great option.
If you were building an AR10 and could go with a short dwell length my recommendation would change (helios qd ti or Nomad for example) Most factory options don't have a short dwell length though.
The resonator k is low back pressure but it's also pretty short and it's definitely not the quietest option.