Skinner makes a peep sight and front sight - scroll down to the bottom of the page:
You would, of course, need to have local gunsmith drill/tap for front sight.
Not having a lot of experience with holsters, I was hoping that someone might be able to tell me the differences (besides price) between this two holsters for a 4.2-inch SP101:
Hi Jason, thanks for the info.
One unrelated question - when are we going to see the limited run Ruger you told us about a couple months ago???????? If you cannot tell us what it is, can we at least get more of a hint (please)????