Armaspec ROOK Micro Compensator Black. Its design is slightly longer than a regular thread protector with sloted gas ports for effective recoil reduction. Its compactness and minimal weight ensure little to no visibility under concealed carry clothing setting it apart from other options. With user-friendly wrench flats for easy installation this comp offers great value Offering compatibility with various holsters and impressive recoil management in a compact lightweight package. The Micro Comp is an excellent choice to enhance your pistol. Specifications for Armaspec ROOK Micro Compensator: Manufacturer: Armaspec Color: Black Caliber: 9mm Luger Fabric/Material: Stainless Steel Threads per Inch: 1/2-28 Length: 0.82 in Width: 0.74 in Features of Armaspec ROOK Micro Compensator Coming Soon Package Contents: Armaspec ROOK Micro Compensator Armaspec ARM4511-BLK: ROOK Micro Compensator Black