......
My wife has a 4" Security Six that I'd like to get a good carry holster for.
Don Hume lists a couple that might suit you. I am thinking of ordering an OWB open top 720 [or is it 721?]. I have not used it or talked to Don Hume about it. The on line listings are confusing - it is listed as compatible one place, but another place lists only the service six, which does not have the big adjustable sights.
jej