I've heard and read of jamming issues but not run into it myself nor seen one jam on the range, I did find the PX4 SC in .40 to be a very comfortable, easy little gun to shoot and accurate as well with a good trigger and sights. Shape and general dimensions should lend well toward conceal carry for the sub compact with thickness of the pistol due to it being a double stack being the only downside, I would say IWB or shoulder carry it.