The GGP compatible Glock 17 match grade barrel is constructed of 416R stainelss steel with 0.003″ dimension and a 1:10 twist rate.
Grey Ghost Precision BARRELG17NTBN GGPMatch Grade Barrel 9mm Luger 4.49″ Fits Glock 17 Gen 3-4, 416R Stainless Steel w/Black Nitride Finish
