If for combat/defense, I'd prioritize flash hiding over everything else. If just for shooting enjoyment, determine what you'd like most from a device, maybe what jaflowers recommended.
I just installed this a few weeks ago and like it so far. It's really light and brakes a bit and hides flash some too (supposedly, as I need to shoot it at night to verify)
Titanium Muzzle Brake/Flash Hider
There was a post here a few months ago and I copied this for reference. I don't remember who wrote it.
Best All round Self Defense non-suppressor Muzzle Device for Scar 17?
Christensen Arms Titanium Slayer Muzzle Brake |
Christensen Arms Titanium Regulator |
The 17 is pretty easy on felt recoil because of the heavy bolt carrier (which ironically also causes some weird recoil impulse that kills optics when it slams forward) so a full brake isn’t necessary. I have the warcomp and like it a lot. -Quote from ?