AERO PRECISION AR15 COMPLETE UPPER 10.5" CARBINE 5.56/223The AERO PRECISION AR15 Complete Upper 10. 5" Carbine 5. 56 223 offers superior performance in a compact package. This upper receiver features a 10. 5" barrel, ideal for maneuverability in close quarters. Precision machined from high quality materials, it ensures reliability and accuracy for your AR15 build. Features and Specifications: Caliber: 5. 56 NATO . 223 Remington Barrel Length: 10. 5" Gas System: Carbine length Upper Receiver: Forged 7075 T6