The AR-15 Upper Receiver with Chamber and Buffer Tube Rod is a complete upper assembly component designed for AR-15 platform rifles featuring an integrated chamber and buffer tube rod system.AR-15 Upper Receiver AssemblyIntegrated chamber designBuffer tube rod includedSKU: RARURBTUPC: 689466565553Essential component for AR-15 rifle builds and replacements providing the foundation for the bolt carrier group and charging handle assembly with proper buffer system integration.