Good muzzle brake - Yankee Hill Machine Phantom 5.56 Q.D. Muzzle Brake 1/2x28 TPI YHM-5M2-QD

I bought this to mount a can on to the gun. Works good, you can feel a difference in the recoil. I mounted it and checked it out while awaiting a can to come in. Try not to take it to an indoor range, it makes the gun load to other shooters for sure. You can feel the concussion when shooting indoors and if near the shooter when they fire.