Product DescriptionThe Sons of Liberty Gun Works Precision SPR 18 inch rifle barrel is built for shooters who demand outstanding accuracy from an AR-15 platform. Chambered in .223 Wylde, this barrel is designed to support precision shooting while maintaining compatibility with both .223 Remington and 5.56 NATO ammunition. Its SPR contour is optimized for accuracy, and the barrel routinely delivers exceptional performance with multiple ammunition types. Constructed from 416R stainless steel and finished in black oxide, it combines match-grade potential with rugged durability. Additional performance features include 3-groove polygonal rifling, a fast 1:7 twist rate, a rifle-length gas system for smooth operation, and 5/8x24 muzzle threads for muzzle device compatibility.Product Highlights 18 inch precision SPR-profile AR-15 barrel chambered in .223 Wylde for excellent versatility and accuracy Made from 416R stainless steel with a black oxide finish for strength, corrosion resistance, and a clean tactical look 3-groove polygonal rifling with a 1:7 twist helps support consistent stabilization across a wide range of bullet weights Rifle-length gas system promotes smoother cycling and improved control during precision shooting 5/8x24 threaded muzzle and non-MK12 profile design make this barrel a strong choice for custom rifle builds Specs Product Type: Rifle Barrel Brand: Sons of Liberty Gun Works Manufacturer Part Number: 18Precision-SPR-223 UPC: 644625302103 Barrel Length: 18 inches Chambering: .223 Wylde Platform Fit: AR-15 Barrel Contour: SPR Material: 416R Stainless Steel Finish: Black Oxide Rifling: Polygonal, 3 Groove Twist Rate: 1:7 Gas System Length: Rifle Length Muzzle Thread Pitch: 5/8x24 Approximate Weight: 3 lbs Country of Manufacture: United States Profile Note: Not a MK12 profile barrel 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.