Product Description The Luth-AR BL-F14-7 is a 14.5 inch SOCOM M4 profile barrel designed for AR-15 builds chambered in 5.56 NATO. Built from chrome moly vanadium steel and finished in a durable manganese phosphate (Mag Phosphate) coating, this barrel is configured with an F-marked front sight base for a classic fixed-sight setup. A 1:7 twist rate supports a wide range of common 5.56 and .223 projectile weights for versatile performance. Product Highlights 14.5 inch SOCOM profile AR-15 barrel for compact handling and M4-style builds F-marked front sight base for a proven fixed front sight configuration 1:7 twist rate suited for many popular 5.56 NATO and .223 Remington loads Chrome moly vanadium steel construction with manganese phosphate (Mag Phosphate) finish Threaded muzzle shown in product photos for common AR muzzle device installation Specs Brand: Luth-AR Manufacturer Part Number: BL-F14-7 UPC: 812058031727 Caliber: 5.56mm (also listed as .223 Remington / 5.56 NATO) Barrel Length: 14.5 in Twist Rate: 1:7 Profile: SOCOM M4 Material: 4150 Chrome Moly Vanadium (CMV) steel (listed as not chrome lined) Finish: Manganese phosphate (Mag Phosphate) Sight Base: F-marked front sight base installed Notes: Does not include front sight post, spring, and detent 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.