[pioneer461]

XS Sight System's 24/7 Express Sights may be what you are looking for. I have a set of them on my S&W 457 .45acp. Most pistol sights and 3-dot systems are made for target shooting. The Heinie / Express sights are modeled on dangerous game rifles and are made to give you a slight edge in sight acquisition.

http://www.xssights.com/store/handgun.html