It sounds like you bought the ultra match spring set from hk parts includes 1 reduced trigger return spring and 1 reduced sear spring.
Hk vp9 match trigger.
The vp9 type 1 trigger system is a direct drop in replacement for the standard hk vp9 trigger.
Each two part precision calibrated spring set will deliver consistent force through the entire compression release cycle to give you a light refined.
Specifically the trs output is too low to be reliable.
I have felt others that are definitely better so i am not saying that all of them are bad just that there is some definite factory variance.
So i installed my hk vp9 ultra match trigger springs yesterday.
You are feeling a delay because the trs is weakening so the trigger isn t resetting with alot of forward force.
All the while providing an overall smoother trigger with a better trigger reset.
Ergonomics and aesthetics were considered early on to create a boutique item that not only provides excellent performance but compliments the already great looks of the h k s vp9.
Ultra match drop in spring kit will give your vp9 vp40 an even smoother crisper and lighter pull that helps promote consistent match grade accuracy and control by dropping the trigger pull of your vp9 vp40 by an average of 2 pounds.
This will fit all of the hk german usp 9mm 40 45 cal pistols.
The match trigger kit will adjust the trigger pull on single action sa to about 4 lbs.
Ultra match spring set hkp 17222 reason.
And the double action da pull to roughly 7 5 lbs.
Titanium striker hkp 17643 reason.
Review of the hk vp9 comparing the trigger to a p7 and match trigger on a usp 9 expert.
Also i go over disassembly tricks.
These strikers experience accelerated wear on sear surface not serviceable.