Stock Glocks are not noted for good triggers - and it puzzles me that some people advocate making the mediocre trigger
worse by adding a NY or NY+ spring.
Sure, I understand why politicians want cops to have guns that don't work right, but other people???
AD's are prevented by keeping your finger off the d@** trigger until you're ready to shoot, and taking a little weight off an already heavy pull is not a factor when your adrenaline is up, as it will be in a defensive situation.
Anyway, we're not talking about the proverbial "hair" trigger here. If the other parts are stock, a "3.5 pound" connector will probably yield a real trigger pull of about 5 pounds or so. IMHO this is fine for a carry gun. A little judicious polishing of the internals with a Dremel tool, felt wheel, and Simichrome will make the trigger smoother, as well. But it won't be a "hair" trigger.
The only caveat is to try and get a
genuine Glock connector from someone like Glockmeister. Though pretty simple, the connector actually functions a bit like a leaf spring in operation, and some aftermarket connectors (and many other aftermarket, non-Glock parts, for that matter) will impair reliability.