i was in shop today looking at a DW PMC. Owner came over when he saw I was going to drop slide ( on empty chamber of course) Asked for the gun , took magazine out and gently closed slide . Said " you can do that once it's your gun " I've seen articles & videos on both sides of this issue I wasn't really put off by his comment although he could have used it as a teaching moment , and explained the why. Any thoughts about this are welcome . How much damage would this do to internals ?