ULTRADYNE Lithium PCC Compensator 9mm Luger Black Nitride 416 Stainless Steel 1/2"X28 tpi Lithium Is a Superior PCC Compensator From Ultradyne That Allows a Shooter To Easily Stay On Target By featuring Aggressive Compensation Ports Along With added Recoil Reduction. This results In faster Follow-Up Shots With increased Accuracy. The Gases Are strategically vented, So They Do Not Obscure The Sight Path Or Travel Back Towards The Shooter. A Timing Nut Is Included For Easy Installation. Model: Lithium Material: 416 Stainless Steel Thread Pattern: 1/2"-28 tpi Finish: Black Nitride