TPRCSN Barrel, 9MM, Rainbow, Thread Protector, Threaded, Fits Glock 19 TP-G19B-XTS True Precision barrels are match grade drop in barrels which are designed to provide more reliable feeding of hollow points and defensive ammunition. This barrel is threaded 1/2x28 and features improved overall fit compared to OEM barrels thanks to the addition of added chamfers" improved radius cuts" and more. A thread protector is included with every barrel. The barrel is machined from 416 stainless billet and is made right here in the USA.