Product Description The Ultradyne USA MERCURY muzzle brake is engineered for .223 Remington/5.56 NATO to deliver superior recoil reduction and help neutralize muzzle rise for faster, more accurate follow-up shots. Its progressive 90Adeg side ports vent combusting gases in timed intervals to spread out the recoil impulse with a smooth, balanced release of blast energy. Built from durable 416 stainless steel with a nitride finish, the MERCURY includes a timing nut to simplify installation and indexing on 1/2x28 threaded barrels. Product Highlights Purpose-built muzzle brake for .223/5.56 rifles to reduce recoil and muzzle climb Progressive 90Adeg side-port design spreads recoil impulse for improved control and shot-to-shot speed 416 stainless-steel construction with rugged black nitride finish for corrosion and wear resistance 1/2x28 thread pitch fits common AR-15 style barrels and similar platforms Includes timing nut for easier installation and proper timing/alignment Specs Brand: Ultradyne USA Model: Mercury Type: Muzzle Brake Caliber: .223 Remington / 5.56 NATO Thread Pitch: 1/2x28 Material: 416 Stainless Steel Finish: Nitride (Black) Includes: Timing Nut Overall Length: 2.43 in Outside Diameter: 0.865 in Weight: 3.1 oz (brake only); 3.9 oz (with timing nut) Country of Manufacture: USA Manufacturer Part Number: UD10670 UPC: 851019008279 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.