The American Precision Arms Gen 4 Little Bastard Nitride 6mm muzzle brake is engineered for precision and performance. Its innovative U.R.P tunable top ports offer unparalleled adjustability ensuring the flattest shooting experience with virtually no vertical movement. Designed through meticulous testing of port size and gas flow this model provides superior recoil management. With a nitride finish and a 5/8"x24 thread pattern the Gen 4 Little Bastard is a top choice for those seeking optimal shooting stability and control.