The TCS manufacturing AR upper receiver and buffer tube rod utilize advanced dual-thread technology, accommodating both 5/16-27 TPI and 8-32 TPI threading. This innovative feature enables the cleaning of the upper receiver and buffer tube using the TCS manufacturing AR-15 jag, as well as the chamber with the TCS Manufacturing AR-15 cleaning brush. The convenient 16 inches length ensures compatibility with buffer tubes of all lengths. Ergonomically designed screwdriver style handle 16 inches non-rotating aluminum shaft Dual-thread technology Manufactured in the United States