Same performance in a short, compact brake that looks "right" and saves weight on carbines or lighter rifles. .750" (19mm) O.D. can be turned down to .650" (16mm) to match thinner barrel contours. Mfg: Vais SPECS: Stressproof steel (CM), in the white, 416 stainless steel (SS), heat treated. 1 3/4" (4.4cm) ;long. 1/2"-32 tpi. Requires threading of barrel.