So the past week I've been appendix carrying my M&P9c I've recently acquired since I resolved to give my p938 to the girlfriend for her 21st bday. I settled on the M&P as my replacement "deep carry" gun. I was unsure how I would feel about AIWB at first,so I picked up a cheap bianchi 100 series clip on from the bargain holster box at the LGS and wet it down and remolded to fit the M&P. At this point in time I would only recommend someone try AIWB if you are experienced and comfortable in handling guns,as the stakes are much higher for a ND when the gun is positioned this way on the belt line,as it would either result parting you with a family jewel or worse,missing them and taking out a femoral artery,it seems the best outcome would be a shattered pelvis. That being said I've been shooting a lot of IDPA and safety has been subconsciously ingrained in me now so I am only a little paranoid about the issue,but am taking extra precautions reholstering. Now,on to how it carries. If you carry a gun with a shorter barrel and wear your jeans high enough that when you sit the gun and belt stay horizontal then your golden,very comfortable. You don't have to have a 6 pack either to carry this way,I have some loose skin from some massive weight loss some years back and this seems to HELP conceal the gun,so a little Dunlap would actually help do the same I do believe. This carry position is very natural feeling for me,draw is lightening quick,defending and retaining your gun from this carry mode is almost instinctual as humans (or at least I) tend to draw in towards my centerline when startled.. I would encourage anybody experienced in guns and curious about this mode of carry to give it a shot with some extra attention to safety while you do so. But overall I believe this can be a safe and effective way to carry your gun. And will be my main mode of carry from now on I believe.