Ruger SP101 comes in 3" and 2.25" in barrel length. 3" has two model while 2.25" has 5 models. Also, it comes with a hammer or hammer-less. Is the one with an exposed hammer capable of both SA and DA? How's the recoil on the 2.25"? I know the 3" is a better shoot with longer barrel and less recoil. But for carrying, the 2.25" might be easiler to conceal.
I imagine the one without exposed hammer is DA only. Two 2.25" models come with Crimson Trace LaserGrip and ask for $250 more. What's the use of the LaserGrip? Is it worth it?
I plan on putting Crimson Trace on my SP101. Check out this video...
The 60 is a traditional DA/SA exposed hammer revolver. The 640 and 642 are "Centennial" revolvers in DAO with no exposed hammers. Personally I prefer a 3" M-65. You can find them used and they shoot great.
In life, strive to take the high road....It offers a better field of fire.
"Robo is right" Fuzzball