Luth-ar AR-15 Complete Upper Features The Luth-ar AR-15 Complete Upper is built around a 24 inch fluted bull barrel made from 416 stainless steel a profile chosen to add strength and stability for precision shooting. The fluting reduces weight while helping the barrel dissipate heat more effectively during longer strings of fire which matters when a precision build is run hard across multiple strings. A 1-9 twist rate is well suited to stabilizing heavier .223 Remington projectiles commonly used in precision and long range applications giving builders flexibility in bullet selection without sacrificing accuracy. The threaded muzzle allows shooters to add a suppressor or muzzle device for improved recoil control or sound reduction making the barrel adaptable to a range of shooting disciplines. This complete upper includes an A3 flattop receiver finished in Black Hardcoat Anodize along with the bolt carrier charging handle forward assist and ejection port cover already installed so the bulk of the assembly work is already done. A low profile gas system keeps the upper s silhouette clean while cycling reliably helping the barrel s precision-oriented profile stay the focus of the build rather than the gas system. The 15 inch Palm Handguard features M-LOK slots for mounting accessories along with a full length Picatinny top rail for optics giving the finished rifle room for lights bipods and other accessories without adding unnecessary bulk. This combination of a precision barrel and a ready to run receiver assembly makes the Luth-ar AR-15 Complete Upper a strong choice for builders focused on accuracy who want to drop a finished upper straight onto their lower. Luth-AR AR-15 Complete Upper Specifications Manufacturer: Luth-AR Caliber: .223 Rem Barrel Length: 24 Barrel Finish: 416 Stainless Steel Barrel Description: Fluted Bull Twist Rate: 1:9 RH Handguard: 15 M-LOK Receiver Description: M4 Feed Ramp Receiver Material: Aluminum Receiver Finish: Black Hardcoat Anodize Thread Pattern: 1/2x28 Available At: GrabAGun