Beautiful MKIII .40 S&W Converted to .357 Sig
This video showcases a custom FN High Power Mark III pistol that was originally chambered in .40 S&W and has been expertly converted to .357 SIG. The modification involved significant work on the slide and barrel, including a new barrel with an 11-degree crown and a slide cut for a specific sight. The firearm also features a custom trigger job, Trijicon sights, and Hogue grips, all finished in graphite black.











