I carry a M&P compact and it is in a IWB holster. Put your fears to rest by doing a simple test. If you have access to reloading, take a resized case with a live primer, no bullet or powder and chamber it in your gun. Then with safety glasses and the gun pointed in a safe direction and your finger off the trigger, tap the muzzle on a wooden table, tap it on its side, slam it down on the table on the mag baseplate, even drop it on the table. It never goes off until YOU pull the trigger.