Dead Air Wolverine Thread Insert .35 cal. 1/2-28Dead Air Wolverine Thread Insert . 35 cal. 1 2 28 Thread insert designed for . 35 caliber with a 1 2 28 thread pitch; Compatible with most . 223 5. 56mm rifles; Works with Wolverine Collars (M14 Collar required); Designed for use with Dead Air Wolverine suppressors; Ensures precision alignment and reliable performance; Enhances the versatility and adaptability of the Wolverine suppressor Item Category Code: 7600 Product Group Code: 7600P Inactive: No