Debris can get in behind the finger release button and prevent the weapon from being drawn, i.e. it becomes "locked" into the holster. If you carry your handgun in one, keep it clean and check after each "wrestling match", or when in dirty/dusty/nasty scenes or climes. As a fire investigator, I check to see that the button/release depresses each time I come out of a fire scene. I even check it several times a day, out of habit.
AND...if youre not smart enough to operate this HOLSTER, you have no business around a loaded firearm!
AND...if youre not smart enough to operate this HOLSTER, you have no business around a loaded firearm!