CMC Triggers Match Precision Fluted Barrel Compatible With Glock 17 Gen. 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 CMC Triggers Match Precision Fluted Barrel Compatible With Glock 17 Gen 3: Manufacturer: CMC Triggers Barrel Length: 4.48 in Caliber: 9mm Luger Additional Features: 1/2 X 28 Thread 416R Stainless Steel 1-10in. Twist Package Contents: CMC Triggers Match Precision Fluted Barrel Compatible With Glock 17 Gen 3 The CMC Triggers 75511 Match Precision Fluted Barrel Compatible With Glock 17 Gen 3 is a quality addition to the CMC Triggers lineup. For more great deals on Pistol Barrels by CMC Triggers please browse our CMC Triggers Gun Parts page. CMC Triggers 75511 Match Precision Fluted Barrel Compatible With Glock 17 Gen