Why stick with an OEM-spec barrel in your SIG Sauer P320? Don't you want it to perform at the best possible level? This Polymer80 PF320 Barrel is not only designed to drop right into your Compact pistol slide, it'll enhance accuracy, too! These barrels are CNC-machined to match-grade tolerances, so there's no slop that'll throw that perfect shot one way or the other. Put your rounds right where you want them! Each Polymer80 PF320 Compact Barrel is machined from 17-4 PH stainless steel, features broach-cut rifling and a 42HRC heat-treatment. The barrel is outfitted with a 1:16-inch right-hand twist rate and can be had with a matte stainless-steel finish. Mfg: Polymer80