b'*EZ Brake mount & Cam-Lok Piston includedLENGTH.7.9 Full,6.6 Short DB REDUCT.20dB 9mm, 32dB .308 WINWEIGHT.15.7oz Full, 12oz Short MATERIAL.H900 & Nitrided 17-4SSDIAMETER1.375 MSRP$1095RATED FOR.Rifles : 30 Cal up to 300WM and below to .22 CalibersPistol : 9mm'