Faxon Firearms Sig P320 Barrel Features The Faxon Firearms Match Series barrel is machined in house from stress relieved 416-R stainless steel a premium material choice that resists wear and holds tight tolerances over thousands of rounds. Chambered in 9mm this barrel features a flame fluted drop in profile with a 1:10 twist rate that stabilizes a wide range of bullet weights. An 11 degree target crown protects the rifling at the muzzle helping preserve accuracy over the life of the barrel. Conventional button rifling allows the barrel to safely digest a broader range of ammunition types including cast lead bullets that some polygonal rifled factory barrels cannot handle. Both the inside and outside of the barrel receive a salt bath nitride finish increasing lubricity for smoother cycling while adding meaningful resistance to surface corrosion and wear. The barrel drops directly into factory spec Sig Sauer P320 Full Size slides with no gunsmithing required and better than factory tolerances deliver a tighter more consistent lockup than the factory original. A 1/2x28 threaded muzzle accepts a suppressor or muzzle device expanding the pistol s versatility for range use or home defense. This barrel is not compatible with the M17 or X-Series pistols including the X5 and X5 Legion so P320 Full Size owners should confirm compatibility before ordering. Faxon Firearms Sig P320 Barrel Specifications Manufacturer: Faxon Firearms Model: Match Series Type: Barrel Caliber: 9mm Compatible Hosts: Sig Sauer P320 Full Size Barrel Length: 5.5 Barrel Material: 416-R Stainless Steel Barrel Finish: Black Nitride Twist Rate: 1:10 Thread Pattern: 1/2x28 Rifling: Button Rifled Conventional Color: Black Available At: GrabAGun