Product Description The Rugged Suppressors 3 Port Muzzle Brake is built for .338 caliber and 8.6mm rifles to help reduce recoil and improve control when shooting unsuppressed. It features Rugged&&';;s Dual Taper Locking System for secure, repeatable alignment and is designed to work with Rugged&&';;s Alaskan360 and Alaskan360Ti suppressors. When paired with the Rugged Universal Mount (R.U.M.), it can also be used with suppressors that use 1.375x24 (HUB) rear threads. Timing shims are included to help properly index the brake during installation. Product Highlights 3-port muzzle brake engineered to tame recoil on .338 / 8.6mm platforms Dual Taper Locking System helps provide consistent lockup and alignment M18x1.5 thread pitch for compatible rifle barrels Fits Rugged&&';;s R.U.M. (Rugged Universal Mount) interface for HUB-style suppressor setups Includes timing shims for easier, properly-timed installation Specs Brand: RUGGED SUPPRESSOR Manufacturer Part Number: MB027 UPC: 850044499182 Type: 3-Port Muzzle Brake Caliber/Bore: .338 Cal (8.6mm) Thread Pitch: M18x1.5 Mounting System: Dual Taper Locking System; fits R.U.M. Mount Compatibility: Rugged Alaskan360 and Alaskan360Ti; HUB (1.375x24) use with R.U.M. Included: Timing shims Color: Black Material: Steel Weight: 2.8 oz Disclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product&&';;s manufacturer.