The only thing better than a normal pistol barrel is a threaded pistol barrel. All pistol silencers require one. Holding to the same commitment to quality as all our products our threaded barrels are tough enough to hold up under the harshest conditions. - CALIBER: 9mm - THREAD: .5 X 28 RH - TWIST: 1:10RH - MATERIAL: 416R Stainless Steel
Determined at checkout.