For years, as a competitive Bullseye shooter, I have used the predecessor model, called the Vantage V1 series, both the black version on my S&W Model 41, and the nickel version on my Ruger KMK512 Mark II before that. Both still work like champs.
I will definitely return to ADCO if either of my dots decide to give up the ghost. I have been very pleased with their quality, reliability and long life.
Good luck on whatever brand/model optics that you may choose for your S&W Model 41. It's a fine pistol indeed.