KAK Industry Bravo Mount for 1-3/8x24 Bravo mount suppressor threads, Configurable Comp/ Flash CanIntended for 13.9"+ barrels, pin and weld will get you to 16" OAL, 13.9" is the shortest barrel that can be used to make 16" oal when p/wRobust Compensator Design, Thread protector sleeve designed to work as Flash Can When InstalledShortens suppressor length compared to using a QD mountOverall Length- 2.828"Threads- 1/2-28 and 5/8-24Bore- 5.56/308/7.62x39/ 9MM, Bore is .370" in both versionsWeight- 10 oz With Sleeve/ Thread Protector, 7.5 oz without Heat Treated for strength and durabilityPhosphate Coated for corrosion resistanceMilled flats for easy installationFully Precision Machined in House at KAK IndustryThis Muzzle device does not need to be timed, it is not pre drilled for p/w, is it designed to be torqued to directly to the shoulder of the barrel, drill through at 6:00 for pin and weld