Product Description Made in the USA, the Ruger American Ranch Muzzle Brake is a factory muzzle device designed to help reduce recoil for improved comfort and better control through longer strings of fire. Constructed from durable alloy steel with a matte black finish, this brake clocks into proper position using an easy-to-use external jam nut/lock nut. It is engineered to reduce noise and blast directed to the sides of the shooter and installs quickly with a 7/8" box wrench or crescent wrench. Compatible with Ruger American Ranch rifles chambered in .450 Bushmaster and Marlin lever-action rifles chambered in .45-70 Government, it features 11/16"-24 threads and a compact profile for field-ready performance. Product Highlights Factory Ruger muzzle brake helps reduce recoil for improved shooting control and accuracy External jam nut/lock nut allows easy timing (clocking) for proper port orientation Alloy steel construction with matte black finish for durability and corrosion resistance 11/16"-24 thread pattern fits compatible .450 Bushmaster and .45-70 Government platforms Quick installation using a 7/8" wrench; compact 2.20" length and 1.00" diameter Specs Brand: Ruger Manufacturer Part Number: 90641 UPC: 736676906413 Product Type: Muzzle brake Material: Alloy steel Finish/Color: Matte black Thread Pattern: 11/16"-24 (11/16"x24) Overall Length (OAL): 2.20 in Diameter: 1.00 in Weight: 3.0 oz Compatibility/Fit: Ruger American Ranch (.450 Bushmaster); Marlin lever-action (.45-70 Govt) Country of Manufacture: USA 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 products manufacturer.