Two holsters came today from JM Custom, and I am very excited to tell you about them. I'm in the process of making a platform shift from Glock to Sig 320 (I'm happy to discuss that in this thread, but am going to keep this post focused on the holsters). My carry guns are two P320c's: one has an action job from Robert Burke and a SureFire XC1 light. The other is stock, but with a subcompact gripframe.
The JMCK holsters are as usual of the highest build quality, with rounded corners and edges. Importantly, the AIWB holster fits both guns, and has solid retention for the 320c without the XC1. In fact, the retention on the AIWB holster is tighter than I'm used to. This is not a bad thing--just worth mentioning. The new design for the Kydex split loop allows a small amount of cant, which was essential for this holster (it needed a slight cant away from my right leg to make the muzzle vertical).
In the IWB #3, with the subcompact gripframe, the 320c now carrys very much like my Glock 26.
One minor criticism is that the insides of the holsters were very dusty when they arrived. Another small improvement would be to round off the edges of the Kydex split loop because they were sharp enough to scrape a finger during the draw.
As usual, I added my homemade
Junk Carry Pillow to the AIWB holster, to keep the muzzle pointed in a safe direction, and to tuck the grip. This new AIWB holster has the best comfort and concealment I've ever had. As I sit writing this, I completely forgot I had it on. The greater area for the light creates padding that removes pressure on the inner thigh and really tucks the grip. I'm attaching the obligate crotch shots--this time with a pretty tight shirt.
I give these holsters an A+. I'm happy to field questions...
(note that the blue in this picture is a digital artifact, not part of the holster)