That's the gun I bought, with 3 & 1/16" barrel as pictured here:
http://www.snubnose.info/docs/sp101.htm
Quote:

If your looking for a top rate revolver at a great price, check out the Ruger SP101. They sell new around here for $399. They are stainless steel, indestructable, 5 shot, and easily concealable with the 2 1/8 or 3 inch barrel. The 2 1/8 inch barrel version also is available with a spurless hammer, for snag free drawing from pockets, etc. Mine is a 357Mag and is super reliable and easy to shoot. It has fixed sights, but they are spot-on from the factory.




Al