For OWB carry for an L frame, I've been using a
Galco Phoenix for about 15 years. They were $120 at the time, they've gone up a bit since then
. I like the thumb snap vs. stupid snap on the outside, and it can be RH strongside or crossdraw depending on what you need. I don't have a picture of it handy, but my S&W 620 (half underlug 4", see my avatar) rides in it comfortably, and it's been on my hip while hunting for years. Not sure I'd want to try IWB with a 4" L-frame, but the rig above conceals well enough in wintertime or under a heavier jacket.
Either way, a good gun belt is a must. I've been using
Bullhide Leather Belts almost exclusively since 2014, and a Galgo Rigger's type belt before that. If you're trying to carry a heavy gun like that on some cheap belt from Kohl's or something, you're gonna have a bad time