Neatly controls the ear shattering muzzle blast by directing the gases, and noise, away from the shooter. Does not affect accuracy or velocity - Reduces recoil for comfort. Reduces muzzle rise for fast follow-up shots.
Big Book Catalog, Issue:73, Page:177
SPECS: Steel, polished blue (PB), matte blue (MB) or stainless steel (SS), satin finsih. 1.94" (49.3mm) long x .750" (19mm) O.D. All calibers are 1⁄2"-28 tpi thread