Took my gen 5 to the range today, shoots awesome! Performed very well. I brought my gen 4 as well, shot them side by side to see id I could notice any differences......well, some differences were noticed when I took the Gen 5 down for cleaning. I am not so sure about this new Ion bonded finish vs the tinnifer that the Gen 4 has. My Gen 4 has about 450 rounds theough it. The Gen 5 now has about 125......the Gen 5 has a lot of wear for that little amount of rounds, IMO of course. The Gen 5 looks like its had more rounds than my Gen 4. Look at the pics below. You will notice the tooth picks. The slide on the left is the Gen 5. Its already removing material. I can catch it with my fingernail. The Gen 4 doesnt look that bad. The barrel also has a notch in it, not sure whats up......? What do you fellas think? Gen 5 on right in this pic. Notice where the material/ finish is coming off at the top of the ejection port.