My agency has quite a few Gen 4 17's and 19's we got back in 2012 or so. There have been no problems whatsoever with any of the guns. They all arrived with the updated parts and corresponding numbers.
The only person on my agency that had a problem was me. I ordered in a 3rd gen 19 to avoid the problems with the gen 4 guns. In the time it took us to receive the order the gen 4 guns were updated and upgraded across their line. And the gen 3 guns began exhibiting problems. I had to upgrade it with the 30274 ejector and haven't had a problem since.
At this point I'd guy a gen 4 before a gen 3. Unless I could verify it's quality or that it had a newer ejector.
Sig Sauer LE Armorer
Glock LE Armorer
Colt AR15/M16 Armorer
T.O.S.S. (Tactical Officer Survival School) inst. Tom Long
Vicker's Tactical Pistol 1 & 2 Carbine 1 Advanced carbine Inst. Larry Vickers
Intermediate pistol Inst. Ken Hackathorn
Combat Speed Inst. Dave Harrington
Performance Pistol Inst. Frank Proctor
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