which muzzle device is that? looks like a 3 chamber brake that will divert blast backwards? great for muzzle climb but hard on the shooter. for a CQB setup perhaps consider a linear blast diverter like a troy claymore or one of these brake/diverter combos.
http://www.tactical-life.com/gear/a...t-control-devices-2016/#balsum-blast-ferfrans
it pushes the blast and noise forward away from the shooter. brings the noise down from full retard to mostly retard level. the downside is recoil is increased, but for CQB shooting of a 5.56 it's inconsequential. for longer range shooting with magnified optics these blast devices do disturb sight picture. i'm running a troy claymore on my bolt 5.56 and it makes shooting super pleasant.
I'm running the Precision Armament M4-72 muzzle break.
https://precisionarmament.com/product/m4-72-tactical-compensator/
A little loud but it is what it is. I use it on two of my 5.56 and one 308.