b'RESISTANCERESISTANCE9 *Piston not includedLENGTH.6.75 DB REDUCT.34dB Dry 9mmWEIGHT.8.5oz MATERIAL.7075 Al & H900 14-4SSDIAMETER1.375 MSRP$649CALIBER9mm RATED FOR.Pistol calibers, 300BLK, 7.62x39 and 6.8spcThe RESISTANCE features 17-4 stainless steel, heat treated, patent pending, ECO-FLOW baffles with anti-rotation features. These baffles ensure maximum strength and sound performance as well as reduced gas blow back on semi-auto or full-auto firearms vs traditional designs.'