b'M4SD-II/K M4SD-II* GATE-LOK Hammer Comp mount includedLENGTH.6.6 DB REDUCT.34dB 5.56mmWEIGHT.17.4oz MATERIAL.H900 & Cerakote Finished 17-4SSDIAMETER1.5 MSRP$945CALIBER.5.56mm RATED FOR.No Barrel RestrictionsUnique to Griffin GATE-LOK family suppressors is the mounting interface. The mounting system is one of the fastest on the market and accommodates the A2 nato compensator as well as Griffins proprietary performance rich muzzle device options. Additionally, the GATE-LOK mounting system does not suffer'