GD there are documented problems with both platforms. But no one here can answer that question about that particular gun. I have had good luck with every one I have purchased or been issued.

Because I instruct during our academies and inservice I see a lot of pistols and malfunctions. Some are the shooters fault some are ammo, some are magazines and some are just plain quality control or design from the manufacturer.

We got the newer gen three and others had so many problems we kept them less than 6 months and they would not let us buy them. We got the Gen 4's and I saw some terrible triggers. Mine wasn't bad but much worse than my last pistol. I did see plenty of problems with the triggers and recoil springs etc in the Gen 4's. We have exchanged a bunch of parts.

You may be like me and never have a problem. I run some serious ammo through mine and have never had an issue. I shoot more than most.

Either way you can fix the problems if they occur. I highly recommend you fire at least 500 malfunction free rounds before you trust any pistol. Its just good insurance.