Crosstac Mk109 5.56/223 Muzzle Brake - The Crosstac Mk109 Muzzle BrakeTM is a self-timing design based on science and engineering research into both port sizes and distances from the muzzle crown. It changes size and location mathematically by...
Crosstac Mk109 5.56/223 Muzzle Brake - The Crosstac Mk109 Muzzle BrakeTM is a self-timing design based on science and engineering research into both port sizes and distances from the muzzle crown. It changes size and location mathematically by...