I put an AK-74 brake on mine, in hopes that its large expansion chamber would soften the blast a bit. Looks like it made no difference whatsoever.I am using a linear compensator. It, to me is not a function of recoil,rather a function of noise and blast mitigation.
Shooting a .223/5.56 indoors without a suppressor will be an ear ringing experience. Doesn't matter if you use a brake or flash hider.One other thing to think about, if you are planning to use your C model as a home defense gun a muzzle brake will damn near deafen you inside a room.