Agency Arms(R) Mid Line Barrels are for those who desire functionality as well as a unique appearance. While each of their lines maintain the same core accuracy and reliability, Agency's Mid Line focuses on additional machining enhancements and appearance while only a having modest price increase over the Standard Line models.Features :Twist: 1/10416R Stainless SteelPulled broached/ Saami Spec 9mm RiflingGlock 19 Gen 5 Compatible1/2X28 threads