Sig sauer threaded barrel in sig p220 nitron full-size - EFK Fire Dragon Sig Sauer P226/357 Pistol Barrel

The barrel fit and finish are as good as OEM which is the best information a consumer could ask. The barrel allows a Sig P226 full-size OEM .40 cal to now fire .357 Sig....recoil spring and magazines are the same. The chamber is fully supported and the barrel is actually 4.5" long which is an increase of 0.10" over OEM Sig barrel, a definite positive as more barrel length more bullet velocity. Dropped in and cycled cartridges as well as the OEM item. No gun-smithing at all required. My only complaint is once installed, there are NO visible markings on what caliber the barrel is chambered. The barrel is marked .357 Sig but once installed, this marking is no longer visible. So you'll need to have the barrel stamped or laser etched to show the caliber of this hand gun.