I have always been one of those “leave it stock” Glock people, the exception being using Glock factory parts such as a “-“ trigger bar and springs or changing out a serrated trigger out on a combat/sub compact to a smooth trigger on the full size guns, to me it kept the guns “stock” and the chances of having issues were virtually nil.
I still feel that way about carry guns to a point but after using some aftermarket gear on my G17 that I compete with, I can honestly say my feelings on reliability are no longer valid, I started shooting Glock pistols back in the late 80s and the only thing aftermarket parts did for me was cause reliability issues, this simply doesn’t appear to be the case anymore “IF” a person understands how Glocks function and they don’t go nuts trying to get a 1911 trigger on a Glock.
I want my guns to shoot any ammo in any weather and the easiest way to assure this is to leave the striker spring alone, yes you can get a trigger pull under 3 lbs and it’ll be extremely nice, but you will without a doubt have light primer strikes, extended strikers help but once you cross a certain threshold you introduce all kinds of other issues you’ll be chasing down for a while, if you’re fine with that go for it, it drives me nuts unless it’s just a range toy.
I know you didn’t ask all of the above but I “assumed” you’re new to Glock modding and I thought it was worth putting out there to hopefully save you some money and frustration.
With all that said yes Apex trigger kits are well worth the money, in my opinion Apex doesn’t make the best Glock trigger systems but they are very good, the trigger will be much better than stock with a smoother pull, brake and a slightly shorter reset and the purchase on the trigger bow feels light years better, but it won’t be a life altering kind of difference imo.
I’d suggest asking forum members who have aftermarket triggers in their Glocks to let you shoot theirs first and get all of the details of what they are using when you find one you really like, triggers are very subjective imo so keep that in mind.
Personally I think ZEV & CMC kits feel better than Apex, the break on the Apex Glock triggers just feel a little off for me personally because they change something in the Geometry of the way the trigger flows, again just my opinion, I know plenty of people that love them, on the flip side the M&P Apex kits are amazing and imo the best feeling M&P trigger ever made, again very subjective.