Tactical Kinetics Pistol Barrel Sig Sauer P320 Full Size Non-Threaded Black Nitride. 416R stainless steel is recognized for its corrosion resistance machinability and high tensile strength; it is the industry standard for premium Match Grade barrel manufacturing. Tactical Kinetics's propriety in house machining production and Quality control inspection process's allow us to attain an ultra-precise barrel with enhanced slide fit & lock up for improved accuracy. Barrels are 6 groove cut rifled 1:10 Twist Right Hand fully QC inspected double honed (rough and finish) to produce the smoothest bore possible with a Max Roughness Average (RA) of 12. Finished bore dimensions are held to +/- 0.0005" tolerance from nominal groove and bore dimensions but the dimensions are uniform to within 0.0002 for maximum consistency accuracy and quality. SAAMI Match Grade specification chambers precision cut and finished to a maximum Roughness Average (RA) of 16. The pre hardened 416R stainless steel is stress relieved to an exacting recipe after rifling and final hardness is 38-42 Rockwell C before final barrel profile machining is completed. Specifications for Tactical Kinetics Sig Sauer P320 Full Size Non-Threaded Barrel: Manufacturer: Tactical Kinetics Color: Black Finish: Nitride Caliber: 9mm Luger Gun Make: SIG Sauer Gun Model: SIG Sauer P320 Full Size Barrel Material: 416R Stainless Steel Threads per Inch: Non Threaded Barrel Twist Rate: 1-10 Flutes: No Weight: 0.4 lb Package Contents: Tactical Kinetics Sig Sauer P320 Full Size Non-Threaded Barrel What firearm models does the manufacturer say Tactical Kinetics Sig Sauer P320 Full Size Non-Threaded Barrel is compatible with? The manufacturer suggests that Tactical Kinetics Sig Sauer P320 Full Size Non-Threaded Barrel is compatible with SIG Sauer P320 Full SizeTactical Kinetics TK3057-BLK: Pistol Barrel Sig Sauer P320 Full Size Non-Threaded Black Nitride