b'* 30SD-K Flash Comp mount includedLENGTH.7.6 DB REDUCT.29dB 7.62mm, 33dB 5.56mmWEIGHT.19.5oz MATERIAL.H900 & Cerakote Finished 17-4SSDIAMETER1.5 MSRP$945CALIBER 7.62mm RATED FOR.No Barrel Restrictions'