@ScottMn has provided a photo of the holster I would recommend (post #8). The holster has an elasticizes nylon sleeve that fits the leg comfortably and does not wobble like some strap mounted holsters. I have one for my LCP II, which is the gun I would recommend because in a church or similar situation you target will likely be close enough to you that you would not need a longer barrel. 380 ACP will get the job done, especially if you use the right ammo, 380 JHP will not expand out of a short barrel. Many use FNJ. I use Underwood Extreme Defender. I does JHP type damage without expansion. All my holsters for my.4 Rugers are DeSantis holsters. They are all made and reasonably priced.