Overall Length- 2.913"Outside Dimension- 1"Threads- 1/2-28 and 5/8-24Bore- Works with 5.56/308/9MM/ Similar Weight- 5.92 ozHeat Treated for strength and durabilityPhosphate Coated for corrosion resistanceMilled flats for easy installationFully Precision Machined in House at KAK IndustryPre-drilled for Pin and Weld, will bring 13.7" barrel to over 16" OALCrush washer not included unless added