Optimize the assembly and maintenance of your AR-15 with the NcSTAR AR15 Upper Receiver Block from Brickhouse Adventure. Crafted from durable aluminum, this receiver block features a striking blue anodized finish for added protection and style. It is specifically designed for AR-15/M4 receivers and is fully bore brush compatible, ensuring ease of use and versatility. Whether you're a seasoned builder or a weekend warrior, this tool enhances your workbench setup with precision and reliability. Elevate your firearm maintenance experience with NcSTAR’s unmatched quality and performance.