Sig Sauer Barrel, 9MM, Threaded, P938, 1/2X28 TPI BBL-938-9-T Upgrade or replace the barrel on your P938 with this original SIG SAUER part. The threaded barrel is chambered in 9mm and allows you to attach a suppressor or other muzzle device. A knurled thread cap protects the end when no device is attached. SIG SAUER factory replacement pistol barrels are specially heat-treated for toughness and durability. Thread pitch: .5x28 TPI