I’ve got a RRA 9mm ar-15 and have been thinking about putting an aftermarket muzzle device on it. Anyone have any suggestions?
Suppressor. 
yes in fact! I haven’t looked in depth too much at any companies but if it was a q.d. mount I’d be very interested in it.
I put a Smith Vortex on mine.
Hmmm…I didn’t know they made those for 9mm. How do you like it compared to the standard birdcage and does it have compatibility with suppressors?
Don’t know about suppressor use, thats a bridge i’ve yet to cross. As far as a standard birdcage, I don’t know. I sold off the 16" barrel to fund the 7.5" before shooting with it installed. The Vortex does a fantastic job as far as flash goes. The recoil pulse is completely different so I won’t even go there. Loudness is about the same. Being in an indoor range is difficult to guage.