Product DescriptionThe Ultradyne USA Apollo S is a precision-made compensator muzzle brake designed for .223 Remington / 5.56 NATO platforms with 1/2x28 muzzle threads. Built from 416 stainless steel with a salt bath nitride finish, it is engineered for long-term durability and reliable performance. The Apollo S features a shrouded timing nut to help achieve proper alignment during installation and a .975 in outside diameter profile suited to many AR-style configurations.Product Highlights Compensator muzzle brake designed for .223 Remington / 5.56 NATO rifles 1/2x28 thread pitch for common AR-15 pattern barrels 416 stainless steel construction with salt bath nitride finish for corrosion resistance Shrouded timing nut helps simplify proper timing/alignment during installation Precision manufacturing for durable, long-term reliability Specs Brand: Ultradyne USA Model: Apollo S Product Type: Compensator / Muzzle Brake Caliber Compatibility: .223 Remington / 5.56 NATO Thread Pitch: 1/2x28 Material: 416 Stainless Steel Finish: Salt Bath Nitride Outside Diameter: 0.975 in Length: 2.94 in Weight: 4.4 oz Country of Manufacture: USA Manufacturer Part Number: UD10220 UPC: 851019008613 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.