Product DescriptionThe Luth-AR FTBL-B24 complete upper assembly is built for precision-focused AR-15 builds, featuring a 24-inch fluted bull barrel in .223 caliber. The 416 stainless steel barrel uses a 1:9 twist rate and is mated to an A3 flattop upper receiver. This complete upper comes equipped with a bolt carrier group, charging handle, forward assist, and ejection port cover, and it is finished with a low-profile gas system and a 15-inch ergonomic Palm handguard with KeyMod slots and a Picatinny top rail for versatile accessory mounting.Product Highlights 24-inch fluted bull barrel made from 416 stainless steel for rigidity and heat management 1:9 twist rate optimized for common .223 Remington projectile weights Complete upper assembly includes bolt carrier group and charging handle for a ready-to-install build 15-inch vented Palm handguard with KeyMod slots and top Picatinny rail for accessory flexibility A3 flattop upper receiver with forward assist and ejection port coverSpecs Brand: Luth-AR Manufacturer Part Number: FTBL-B24 UPC: 812058030164 Platform: AR-15 Caliber: .223 Remington / 5.56 NATO (per distributor listing) Barrel Length: 24 in Barrel Type: Bull, fluted, threaded Barrel Material: 416 stainless steel Twist Rate: 1:9 Muzzle Thread Pitch: 1/2x28 Gas System: Rifle length, low-profile Gas Block Diameter: 0.936 in Upper Receiver Style: A3 flattop (assembled) with forward assist and ejection port cover Handguard: 15 in Palm handguard, vented, KeyMod with Picatinny top rail Included Components: Bolt carrier group; charging handleDisclaimer: 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.