Reading through these posts has been interesting. But if I'm not mistaken, mounting a laser on a gun does not replace the iron sights. Both are available. The key is to practice with both, and to not rely on either one alone.
Colt Officers ACP .45cal
Taurus 24/7 G2C .45cal
Ruger LC9 9mm
Remmington 1100 12ga (skeet), Winchester 12ga and a Winchester 20ga stolen in Biloxi (but not forgotten)