The gen 1 / gen 2 issue seems to be a matter of personal preference. The different slide stops can cause problems with the way some shooters grip the gun. I personally like the "sleeker" look of the gen 1 but can comfortably handle both. I get around the compatibility problem by having an FCU equipped with a gen 1 slide stop and another with Gen 2. That way, thanks to the versatility of the P320 platform, I can put together a gun with either gen 1 or gen 2 components.
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