To take control of our AR15 sized .308, POF engineered a, more effective, muzzle break. The outcome was an aggressive oversized muzzle break that harnesses the energy from the muzzle blast and directs the muzzle down and forward. This combination drastically reduces muzzle rise and felt recoil. The muzzle brake still complies with 3 Gun Nation Practical Rifle rules of not larger than one (1) inch in diameter and three (3) inches in length, measured from the barrel muzzle to the end of the compensator.