Mitchell Defense DOC 14.5in 5.56 NATO Upper Receiver Carbon Fiber Wrapped Barrel Black Finish M-LOK Free-Float Handguard. 5in 5.56 NATO Upper Receiver is engineered for shooters seeking lightweight performance without compromising strength. The barrel significantly reduces weight while maintaining excellent thermal stability and accuracy. Its 7075-T6 billet upper receiver incorporates a thermal-fit barrel seat to improve rigidity and minimize point-of-impact shift. The ArmorLube Carbon Cutter BCG with Carpenter 158 HP/MPI bolt provides smooth reliable cycling even in high-volume firing sessions. A free-float M-LOK handguard ensures stable accessory mounting. Finished in E-Series Cerakote this upper is ideal for users prioritizing mobility and precision. Specifications for Mitchell Defense The DOC AR-15 5.56mm NATO 14.5in Upper Receiver: Manufacturer: Mitchell Defense Caliber: 5.56x45mm NATO Overall Length: 23.5 in Barrel Length: 14.5 in Barrel Profile: Standard Gas System Length: Mid Length Barrel Twist Rate: 1-7 Threads per Inch: Non Threaded Muzzle Device: A2 Flash Hider Finish: Nitride Gun Model: AR-15 Fabric/Material: 4150 CrMoV Gun Make: AR Platform Bolt Carrier Group Included: MIL-SPEC Charging Handle Included: MIL-SPEC Features of Mitchell Defense The DOC AR-15 5.56mm NATO 14.5in Upper Receiver Lightweight 14.5" carbon fiberwrapped barrel reduces front-end weight Superior thermal efficiency supports consistent accuracy under sustained firing 7075-T6 billet thermal-fit upper increases structural rigidity ArmorLube Carbon Cutter BCG with C158 HP/MPI bolt resists fouling and wear Free-float M-LOK handguard allows stable accessory integration Black E-Series Cerakote ensures long-term environmental protection Package Contents: Mitchell Defense The DOC AR-15 5.56mm NATO 14.5in Upper Receiver What firearm models does the manufacturer say Mitchell Defense The DOC AR-15 5.56mm NATO 14.5in Upper Receiver is compatible with? The manufacturer suggests that Mitchell Defense The DOC AR-15 5.56mm NATO 14.5in Upper Receiver is compatible with AR-15Mitchell Defense 454111: DOC 14.5in 5.56 NATO Upper Receiver Carbon Fiber Wrapped Barrel Black Finish M-LOK Free-Float Handguard