My custom Sig P226, 40 S&W with extra 9mm Barsto conversion barrel, all bearing surfaces were stoned, polished, and plated with Robar’s NP3 finish, the springs were replaced with Wolff springs, custom MMC adjustable night sights installed by MMC of Las Vegas, Robar NP3 finish applied to all surfaces (interior and exterior)by Robar, action/trigger work performed for a nice smooth trigger.