A Keltec PMR-30 with somewhere between 5000-7000 rounds through it with out cleaning was found to have a broken slide retaining pin. The owner found the headed side of the pin walking out when firing. The other half of the pin remained captive and the pistol functioned perfectly otherwise. I would write this up as a fluke, just a bad pin. I am going to follow up with the owner and see how Keltec treats him and handles this broken part.
While you might not need to clean your firearms, you should at least be checking any serious use firearm regularly for abnormal wear, cracks, and damage.
One shooter had the new XS offset sights. I found them to be far too low and unusable for me. The owner of them initially indicated his displeasure of how long he had to wait to get them, and then at their layout. Later in the day he stated that by using a modified sight picture, he was able to use them to his satisfaction. Despite his change of heart, I feel that they are way to low, unusable, and I recommend against them.
I find the Thorntail offset Scout light mount to be ideal. I highly recommend this product and will be buying another for my self.