Manufaturer Part Number: 8900566 Replacement threaded barrel for sig sauer p320 full-size with a loaded chamber indicator, chambered in 9mm.5.5" long.Sig sauer factory replacement pistol barrels are specially heat-treated for toughness and durability.Thread configuration: 1/2-28 rh.**please note** this barrel is not compatible with the p320 x-five slide.
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