SHADOW 4.5" BRL MR/XR THREADED-BLK

Shadow Systems Match Grade, 4.5" Threaded Barrel, Spiral Fluted, 9MM, Fits Shadow Systems MR/XR Models, Nitride Finish, Black SG9C-02-03TSPL-NIT

Shadow Systems barrels feature minor improvements intended to create more consistent lockup without compromising reliability. The chambers are fully supported and can be fired with hot P ammo and lead bullets. The sample barrels that have survived 5 proof rounds so it is unlikely you will have issues with any mainstream, commercially available ammunition.