Unfortunately I've been waiting for the 9 inch upper to come back in stock, and finally when it does I already ordered the seekins 10.5 upper. Oh well, at least the "whole" rifle will be seekins. I'll need a brake out 2 for it though if not a blackout brake.
what are you expecting out of them? I have the blackout flash hider, blackout brake, breakout, and breakout 2. Main purpose is to mount my suppressor. They do suppress flash, but overall they are all LOUD, maybe b/c my rifles have short barrels.
In that case then yes, it'll suit your needs just fine. The Blackout brake is better with the 2 "baffles" though instead of 1. The brakeout 2's big thing is that it doesn't require timing, which was sort of a pain in the brakeout 1.