Just picked up a new Gen 4 19 test fire date 1-18-12. 215 rounds of Winchester 115 gr. white box and Speer gold dot 124 gr. so far. Glad to report not a single issue with this Gen 4. The finish on this slide seems to be somewhere in between the old shiny finish & the newer dull finish. Think a Gen 4 26 may be in my future, love the feel of the Gen 4 grip.